Merge pull request #273 from kruks23/development

Update Spanish Translations
fixed spelling in README and added mission statement to docs
fetch bookmarks from server
Merge branch 'development' of github.com:siacs/Conversations into development
use proper picture on bookmarked conferences when joined. use bookmark title when no subject is set
pushing bookmarks back to server
Update strings.xml
Merge pull request #275 from BenoitBouvarel/development

Update french translation
strings.xml

Russian translation for Conversations
Delete values-ru
Russian Translation for Conversations

Russian Translation for Conversations - an open source XMPP client for Android 4.0+ smart phones.
use nick from bookmark if available
Merge branch 'development' of github.com:siacs/Conversations into development
Update strings.xml
bug fix on deleting conference bookmarks
Fixed typo Decrpytion -> Decryption
Fixed typo mange -> manage
added confirm dialog before contact and bookmark removal
unregister bookmark on conversation when bookmark is deleted
fixed #276