Merge branch 'issue_76'

# 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