Add support for custom leading via kCTParagraphStyleSpecifierLineSpacingAdjustment.
Merge remote-tracking branch 'upstream/develop' into develop

* upstream/develop:
  Optimized imports (AppCode)
  Updated to point to my repo.
  removed comment from podspec
  added licence in seperate file for use with cocoapods
  forgot to change url of repo, changed that
  added podspec for cocoapods
  Handle <p> and <strong>, <em> tags (via speednoisemovement)
  Not quite sure how == YES == YES crept in...
  Updated README to explain requirements re/iOS6 and iOS5.