EZS-26 - Implement redirection after a user finishes editing the content in the Content Edit form

https://jira.ez.no/browse/EZS-26

**Implemented:**
* [x] Custom redirection on publish action,
* [x] Custom redirection on close action,
* [x] Custom redirection on discard action,
* [x] Method to set next view service params when switching active view services.
* [x] JS unit tests
like the `activeView` attribute I would set the `readOnly` options (http://yuilibrary.com/yui/docs/attribute/#configuration) and then the `app.set` call added in handleMainView should be changed to `app._set`