refactored some code, to avoid assigining inline styles
improved error handline a bit more. CORS errors (status code 0) were not properly displayed
closes #29: Added merge labels option to pivot output
fixed dependency-less build for YASR (to accomodate the new pivot output plugin)
made loading of plugins more robust. a missing require (e.g. when a dependency is missing), will not stop YASR from loading
made dependencies of pivot plugin a bit more robust
moved dependency-less index page as gist