Fix #106 - text selection styles
Merge pull request #107 from box/issue-106

Fix #106 - text selection styles
Fix isCrossDomain check for relative URLs in IE7
Merge pull request #109 from box/fix-iscrossdomain-ie7

Fix isCrossDomain check for relative URLs in IE7
Fix #110 - check for hidden iframe throws for cross-domain frame
Merge pull request #111 from box/issue-110

Fix #110 - check for hidden iframe throws for cross-domain frame
Add support for requiring viewer.js with CommonJS syntax