Merge branch 'hotfix/travis-ci'
Set up AppleDoc, gems and Rake tasks
Active Support link at http://as.rubyonrails.org/ no longer works
Do not split Markdown [links]

AppleDoc does not handle such properly.
Convert to AppleDoc-compatible comment formatting

Compatible with Doxygen too.
Derive the index.html path from the XcodePages output folder
Target latest versions of OS X and iOS
Xcode 4.6.2 adds some lineEnding = 0's
Ignore AppleDoc output
Remove trailing tabs and spaces
Unwrap line, clarify 'this'
Merge branch 'hotfix/appledoc' into develop