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 branch 'webfrontend_errorhandler' into errordump_fixes2