Added notify of received groups and messages for forums and channels to libretroshare.
Show GxsChannelPostItem in NewsFeed.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7675 b45a01b8-16f6-495d-af2f-9b41ad6348cc
fixed error messages in grouter items

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7676 b45a01b8-16f6-495d-af2f-9b41ad6348cc
fixed bug in distant chat randomly screwing up key exchange, and causing distant chat to be unreliable.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7677 b45a01b8-16f6-495d-af2f-9b41ad6348cc