Remove therubyracer because of the following reasons:

* therubyracer is unstable between platforms, platform versions, ruby interpreters and even ruby versons.
  Pretty much everytime there's native extension compilation issue, it is therubyracer.
* therubyracer is officially discouraged by heroku as it uses lot of memory. On the other hand node.js advertises itself as very lightweight.
* using therubyracer on server is just like installing Node that can be used only by ruby apps (you're using v8 anyway)
* btw. node.js is necessary only on Windows and Ubuntu development, on Mac development ExecJS is using JavaScriptCore.

catched from https://github.com/sheerun/rails4-bootstrap/issues/18
Update schema, fixes #320
Merge pull request #307 from openSUSE/review_140712_remove_therubyracer

Remove therubyracer because of the following reasons:
Merge pull request #322 from openSUSE/review_140716_update_schema

Update schema, fixes #320
Adds migration to Email Settings for Venue Updates
Venue update notifications done
Added tests for emails views specs for addition of settings