Enable inline editing if contenteditable is true.

Since inline editing requires the contenteditable attribute to be set to
true, this was an easy way to have both inline editing and the
traditional editor live side by side.

Note that the check for contenteditable ideally should be done with
isContentEditable, but it didn't work correctly in Chrome, probably due
to this ticket:
https://code.google.com/p/chromium/issues/detail?id=313082

Fixes #1
Test cases for enabling/disabling inline editing.

Calls CKEditor's isInline() to check if the editor has properly enabled
or disabled inline editing mode.

A simple $compile wasn't sufficient for testing the non-inline editing
mode. This mode requires the insertion of elements into the DOM for the
toolbars, which means it had to be added to $document to work in the
test case. This is also why all the other test divs now have the
contenteditable="true" attribute, so that they'll still work with the
original code.
Merge pull request #2 from ionparticle/master

Enable inline editing if contenteditable is true.