better RexTFV status
RexTFV status now visible in workspace
added doc
better error icon position
Fixed new error
Error objects are now restored at web frontend.
created skeleton for webfrontend Error handler.
Errors are now also handled for ajax calls (skeleton only)
moved wrap_rpc/wrap_json non-Error handling to the same module that also handles Errors
added doc. contains an ImportError
resolved ImportError
now showing some debug infos on error handler
changes to handleerror
added renderMessage function
changed the way the webfrontend treats errors
Merge pull request #850 from t-gerhard/rextfv_status

better RexTFV status
fixed a severe keyerror
fixed a wrong function call that resulted in errors not being restored by the backend when receiving RPC responses from hostmanager
Exceptions in dumpError are now caught.
Merge branch 'webfrontend_errorhandler' into errordump_fixes2