#93

Added a procedure that ensures that when the questionnaire JSON source is missing it will be restored by downloading if from the server.

Created test MissingJsonFileTest::downloadWhenJsonIsMissing() use it to check the whole procedure.

#92

- oprava chyb vě výpočtu progressu sběru

Questionnaires random invocations NotificationDay check

- posunuty OnTimeChangedListener() pod inicializaci hodnot

# Conflicts:
#	app/src/main/java/cz/muni/irtis/datacollector/lite/gui/questionnaires/QuestionnairesFragment.java
#	app/src/main/res/values-cs/strings_questionnaires.xml
#	app/src/main/res/values/strings_questionnaires.xml

- rozdělení layoutu na dva samostatné
- změny fungování v QuestionnairesNotificationDayDialog

# Conflicts:
#	app/src/main/java/cz/muni/irtis/datacollector/lite/gui/questionnaires/database/repository/QuestionnairesRepository.java
#	app/src/main/res/values-cs/strings_questionnaires.xml
#	app/src/main/res/values/strings_questionnaires.xml

Issue: #78