Update changelog
Added test for removing h2s on chrome
Resolved conflicts in contrib
Update unwanted changes
Remove indentation
Merge pull request #222 from guardian/hg-update-contrib-docs

Hg update contrib docs
Correct selection as per browser behaviour

I'm assuming the browser actually selects the contents of the P, not the P.
Update amd.html to have headings
Correct documentation on `Range.insertNode` bug
Remove erroneous text nodes before markers

These erreonous text nodes are added when the market is appended at the *start* of a block element.
Added lengthy comment
Merge branch 'hg-heading-chrome-fix' into oja-hg-fix-h2
Moved comment to the relevant place and updated it accordingly
Insert BR elements when content is only a Scribe marker
Update expectations now that we append BR elements to inline elements that contain Scribe markers
Tidy up
Tidy up
Fix broken tests for undo manager now that we append BR elements to inline elements
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