Editing an entry, saving, then editing another entry edits the first edited entry

Problem with unbinding cause this.

Fixes #22
Better binding behaviour for navbar buttons

I think this finally cracks the editing issue related to binding and unbinding...

Views now listen for events fired by the navbar buttons instead of directly binding to them.
Merge pull request #23 from devgeeks/issue-22-editing-failure

Editing an entry, saving, then editing another entry
(Only tested on desktop browser - should be enough...)