Empty password doesn't cause change

See merge request !37

# Conflicts:
#	winery/webapp/src/main/resources/templates/fragments/header.html

edit repaired

See merge request !34

Feature/balga/mvc

See merge request !33

Add MVC skeleton, add data seeder skeleton, add CSS styles, add view template, add builders to DTOs, fix null handling in services and mappers, fix DB access in the webapp layer

test and javadoc

See merge request !32

fixed tests

See merge request !31

milesone-2 tests

See merge request !28

Feature/service tests/dudik

See merge request !30

Feature/balga/user tests

See merge request !29