add callback functions to roster methods
Merge branch 'develop'
minify SDK
Merge branch 'develop'
fix remove roster item
Merge branch 'develop'
hotfix for IE and Safari in Chat module
Merge branch 'develop'
small fixes
Merge branch 'develop'
Use MongoDB ID as the XMPP ID
Chat API: create a message and remove a dialog
Merge branch 'develop'
small fix
Merge branch 'develop'
fix console logger for Bosh
improve roster
enable Carbons
entering to room without history mesages
small fix unsubscribe