Removed unneccesary guava dependency
#6: Fixed problem that app appeared multiple times in application list
#3: Disabled repeated checkbox in settings if playback is set to Random
#1: Keep screen active while in exercise
#2: Store selected from, to and topic in preferences
#5: Added language files
#4: Added language files
#4: Added topic and topic translations
#5: Added topic and topic translations
#7: Added topic and topic translations
#7: Added empty language files
#8: Fixed problem in translation of Family topic in French
Merge branch 'develop' into feature/#7-topic-time
#7: Added language files
Merge branch 'feature/#7-topic-time' into develop
#8: Fixed translation of sister in French
Merge branch 'develop' into feature/#4-topic-drinking

Conflicts:
	src/be/webfactor/polyglot/domain/Topic.java
	src/be/webfactor/polyglot/exercises/Language_de.properties
	src/be/webfactor/polyglot/exercises/Language_en.properties
	src/be/webfactor/polyglot/exercises/Language_es.properties
	src/be/webfactor/polyglot/exercises/Language_fr.properties
	src/be/webfactor/polyglot/exercises/Language_nl.properties
#4: Added translations
Merge branch 'feature/#4-topic-drinking' into develop
Merge branch 'develop' into feature/#5-topic-eating

Conflicts:
	src/be/webfactor/polyglot/domain/Topic.java
	src/be/webfactor/polyglot/exercises/Language_de.properties
	src/be/webfactor/polyglot/exercises/Language_en.properties
	src/be/webfactor/polyglot/exercises/Language_es.properties
	src/be/webfactor/polyglot/exercises/Language_fr.properties
	src/be/webfactor/polyglot/exercises/Language_nl.properties