improved iterating over hashmap
added join conference dialog
switch SearchView with custom action view
made message parser and presence parser implement interface On*PacketReceived
moved most of the message/presence generation into seperate classes
cleanup for presence parser
moved iq parser to seperate class as well
made conversation list thread safe
refactored ui listeners a little bit
fixed #268
added statement about status and priority to faq
added two more qna to the faq
spelling in readme
more faq
Update Spanish Translations
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