get the “right” language code on Android
Merge branch 'DA-120' of github.com:ChallengeEarth/drallo-app into DA-120

# By rzaitov
# Via rzaitov
* 'DA-120' of github.com:ChallengeEarth/drallo-app:
  <DA-120> regenerate translations
  <DA-120> regenerate pot and po files with updated update-from-source.sh
  <DA-120> update rel paths inside update-from-source.sh
change the language when user selected an item from spinner (android)
force restart of activity when language is changed
update CultureInfo in ApplicationContext
remove toast