Fix for run thread loop of RsGenExchange (was using logic rather than isRunning, which led to some crashes on rs close
Added request and get MsgRelated function for ids, meta and data
added template function to ease getting meta data from back end;
Updated Nxs tests, tests passed (failed initially because of change option requirements)
Added test for msgrelated Ids, still need to add test for all msgRelated functions (bug with mask, not filtering correctly)
Made changes for forum and wiki gui to use new API but gui needs to call correct get functions now (Bob).
git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5817 b45a01b8-16f6-495d-af2f-9b41ad6348cc