* remove links to readme from changelog

* remove issue numbers from changelog

docs/tech/architecture/definitions/CHANGELOG.md

 ## 0.18.1
 
-Add note to questions. inject/backend#373
+Add note to questions.
 
 ### questionnaires.yml
 
@@ -9,8 +9,8 @@ Add note to questions. inject/backend#373
 
 ## 0.18.0
 
-Add option to tools to signify that they don't require an input. inject/backend#194
-Change the type of `default_response` field. inject/backend#368
+Add option to tools to signify that they don't require an input.
+Change the type of `default_response` field.
 
 ### tools.yml
 
@@ -27,15 +27,15 @@ No format changes
 
 ## 0.17.1
 
-Allow embedding images and videos. inject/backend#359
+Allow embedding images and videos.
 
 All `content` type fields now allow for embedding images/audio/video by using special syntax.
 See readme for more information.
 
 ## 0.17.0
 
-Add support for markdown in questionnaires. inject/backend#361
-Add missing field from tools. inject/backend#297
+Add support for markdown in questionnaires.
+Add missing field from tools.
 
 ### questionnaires.yml
 
@@ -49,7 +49,7 @@ Add missing field from tools. inject/backend#297
 
 ## 0.16.0
 
-More definition enhancements. inject/backend#357
+More definition enhancements.
 
 ### config.yml
 
@@ -71,7 +71,7 @@ More definition enhancements. inject/backend#357
 
 ## 0.15.2
 
-Allow exercise designers to add more information to the definition. inject/backend#353
+Allow exercise designers to add more information to the definition.
 
 ### config.yml
 
@@ -103,7 +103,7 @@ Allow exercise designers to add more information to the definition. inject/backe
 
 ## 0.15.1
 
-Add confirmation button to info alternatives. inject/backend#351
+Add confirmation button to info alternatives.
 
 ### injects.yml
 
@@ -111,7 +111,7 @@ Add confirmation button to info alternatives. inject/backend#351
 
 ## 0.15.0
 
-Allow specifying open-ended questions in questionnaires. inject/backend#340
+Allow specifying open-ended questions in questionnaires.
 
 ### questionnaires.yml
 
@@ -121,7 +121,7 @@ Allow specifying open-ended questions in questionnaires. inject/backend#340
 
 ## 0.14.0
 
-Allow multiple info channels in a definition. #336
+Allow multiple info channels in a definition.
 
 ### injects.yml
 
@@ -133,14 +133,14 @@ Allow multiple info channels in a definition. #336
 ## 0.13.0
 
 Enabled a more fine-grained control over milestone modifications for 
-scale-based questions. #315
+scale-based questions.
 
 ### questionnaires.yml
 
 - remove field `control` in question objects
 - added field `controls` in question objects, 
   which is a mapping of `choice number` to `control`.
-  See [readme](README.md#questionnairesyml) for more details.
+  See definition documentation for more details.
 
 ## 0.12.1
 
@@ -153,7 +153,7 @@ Enable specification of `roles` in `email` type injects.
 ## 0.12.0
 
 Replace `text` field by `content` in `Questionnaire` questions.
-From now, the questions of questionnaires can be formatted via `content`. #251
+From now, the questions of questionnaires can be formatted via `content`.
 
 ### questionnaires.yml
 
@@ -164,7 +164,7 @@ From now, the questions of questionnaires can be formatted via `content`. #251
 
 Change the behavior of `delay` on injects.
 Whenever an alternative is delayed, the condition is now checked throughout the duration.
-If the condition becomes false, the inject is cancelled and a new alternative can be selected. #266
+If the condition becomes false, the inject is cancelled and a new alternative can be selected.
 
 ### injects.yml
 
@@ -173,7 +173,7 @@ If the condition becomes false, the inject is cancelled and a new alternative ca
 ## 0.10.0
 
 Change the behavior of `info` alternatives.
-When an alternative contains no `content`, it will not create an action log. #264
+When an alternative contains no `content`, it will not create an action log.
 
 ### injects.yml
 
@@ -181,7 +181,7 @@ When an alternative contains no `content`, it will not create an action log. #26
 
 ## 0.9.1
 
-Add option to specify initial state for milestones. #263
+Add option to specify initial state for milestones.
 
 ### milestones.yml
 
@@ -190,7 +190,7 @@ Add option to specify initial state for milestones. #263
 
 ## 0.9.0
 
-Removed manual injects. #228
+Removed manual injects.
 All injects are now considered to be **automatic injects**.
 
 ### injects.yml
@@ -201,7 +201,7 @@ All injects are now considered to be **automatic injects**.
 ## 0.8.0
 
 Add a new required concept called `learning objectives`. 
-This concept _must_ be included in all exercise definition. #170
+This concept _must_ be included in all exercise definition.
 
 ### objectives.yml
 
@@ -213,7 +213,7 @@ This concept _must_ be included in all exercise definition. #170
 
 ## 0.7.0
 
-Add simple questionnaires. #165
+Add simple questionnaires.
 
 ### channels.yml
 
@@ -226,7 +226,7 @@ Add simple questionnaires. #165
 
 ## 0.6.1
 
-Add overlay to injects. #153
+Add overlay to injects.
 
 ### injects.yml
 
@@ -235,8 +235,8 @@ Add overlay to injects. #153
 
 ## 0.6.0
 
-Added a new concept called `channels` #151. This concept is saved in a new `channels.yml` file.
-See [readme](README.md#channelsyml) for details.
+Added a new concept called `channels`. This concept is saved in a new `channels.yml` file.
+See definition documentation for details.
 
 ### config.yml
 
@@ -252,13 +252,13 @@ See [readme](README.md#channelsyml) for details.
 - remove field `hidden`
 - rename field `injects` to `alternatives`
 - add field `type` to inject
-- specify new types of alternatives, see [readme](README.md#alternatives-_info_)
+- specify new types of alternatives, see definition documentation for details
 
 ### tools.yml
 
 - remove old `content`, `content_path`, `file_name` fields
 - remove old `milestone_condition`, `activate_milestone`, `deactivate_milestone`, `roles` fields
-- add new fields `content` and `control`, see [readme](README.md#common-definitions) for details
+- add new fields `content` and `control`, see definition documentation for details
 
 ### email.yml
 
@@ -267,12 +267,12 @@ See [readme](README.md#channelsyml) for details.
 - remove old `content`, `content_path`, `file_name` templates from email templates
 - remove `activate_milestone`, `deactivate_milestone` fields from templates
 - add new fields `content` and `control` to email templates,
-  see [readme](README.md#common-definitions) for details
+  see definition documentation for details
  
 
 ## 0.5.1
 
-Allow using directories of files instead of single YAML files inside the definition #128
+Allow using directories of files instead of single YAML files inside the definition.
 
 ## 0.5.0
 
@@ -296,7 +296,7 @@ Allow using directories of files instead of single YAML files inside the definit
 ## 0.4.0
 
 Introduce simplified syntax for `activate_milestone` and `deactivate_milestone`,
-which replaced the old field `reach_milestone`. #98
+which replaced the old field `reach_milestone`.
 
 Instead of the old syntax from `reach_milestone` reminding logical condition,
 the new fields `(de)activate_milestone` have a simple enumeration of milestones,
@@ -318,11 +318,11 @@ which could be separated by a comma, space, or comma followed by space.
 
 ### milestones.yml
 
-- add field `final` to milestones #74
+- add field `final` to milestones
 
 ## 0.2.0
 
-Introduce support for markdown content in `injects`, `tool responses` and `email templates`. #84
+Introduce support for markdown content in `injects`, `tool responses` and `email templates`.
 
 Add new optional folder `content` to the definition file structure. 
 This folder should contain markdown files which will be pointed to by `content_path` fields.
@@ -346,11 +346,11 @@ If neither field is set, then the content is considered to be empty.
 
 ### email.yml
 
-- Add `organization` field to email addresses #83 
+- Add `organization` field to email addresses
 
 ### injects.yml
 
-- Add `organization` field to inject categories #83
+- Add `organization` field to inject categories
 
 ## 0.1.0