categorie array wordt getoond met checkboxen.
scrollview added to category
added user account and link to category screen
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/src/main/AndroidManifest.xml
	app/src/main/res/layout/activity_home.xml
Merge remote-tracking branch 'origin/master'
likes activity and connection to this screen, updated strings.xml