fixed #38
add donate button
formating and paypal disclaimer
added bitcoin address
dirty push / delete flags are not set/reset correctly
Merge pull request #262 from kruks23/development

Show time in messages previous days
fixed #255 and made some other improvements to the subscription mgmt
changed 'show time threshold' to 6h
cleanup. removed old contacts activity. WARNING: this will temporarly disable muc invites
made jingle connection array thread safe
fishing invites and delivery reports out of carbon copied messages
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