fixed #342 - otr with facebook and other services without resources
improved logging for avatar fetches
warn user if no presence subscription exists
MUC: set password from invite message.
Merge pull request #422 from betheg/muc_password

MUC: set password from invite message.
made otr a little bit more solid when there is no presence subscription
Merge branch 'development' of github.com:siacs/Conversations into development
added recent contributors
readme formating
fixed npe
added missing breaks oO
made shareing text with conferences possible again
MUC: set the password from bookmarks.
Merge pull request #424 from betheg/bookmark_password

MUC: set the password from bookmarks.
trying to avoid rejectedexection
deleted some unused string-resources and imports, also deleted edit_account_dialog.xml.
fixed #425
Merge pull request #426 from betheg/remove_strings

deleted some unused string-resources and imports, also deleted edit_account_dialog.xml.
add request like XEP-0184 and marks displayed messages blue and receipts green.