Update German translation.
Merge pull request #313 from suraia/translation-de

Update German translation
Merge branch 'development' of github.com:siacs/Conversations into development
Update Dutch translations.
Merge pull request #315 from jelmer/dutch

Update Dutch translations.
Merge branch 'development' of github.com:siacs/Conversations into development
added swedish translation by @andersruneson
fixed npe when user was very quick with starting to type in startConversationactivity
fixed npe with unsuccesfull bind