Removed the underline button from format bar.
Merge pull request #316 from wordpress-mobile/issue/315-remove-underline-button

Removed the underline button from format bar.
Updated podspec version to 0.2.2
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS-Editor into issue/153-content-area-styling

* 'develop' of github.com:wordpress-mobile/WordPress-iOS-Editor:
  Updated podspec version to 0.2.2
  Removed the underline button from format bar.
Pod updates
zss_field_title font size now 18px