close clip if click outside
minor comment edits
refactor click handling
allow lh navigation clicks to propagate
Removed text preview and added crossDomain flag for Markdown preview
Made cross-domain requests work for IE9
expand check for button element
Merge pull request #3320 from sathomas/clipClick

Clip behavior
fix hover/focus color for link buttons in clips
Merge pull request #3363 from sathomas/clipLinkButton

Clickover color scheme makes Cancel button (nearly) invisible on hover
Merge pull request #3362 from nicolaasmatthijs/amazon-s3

Amazon S3 support
Merge origin/master and fix conflicts