Notifications settings: moved the mute/unmuted button to the toolbar as discussed in IRC.

git-svn-id: https://ios.svn.wordpress.org/trunk@4083 7d847f7c-ffe1-4a24-85be-b788d016d96a
Add support to ruby 1.9 for gencredentials. props tonny xu

git-svn-id: https://ios.svn.wordpress.org/trunk@4084 7d847f7c-ffe1-4a24-85be-b788d016d96a
Added the ability to turn off push notifications for a fix period of time. Removed the shortcut to turn off all blogs for now. We need to find a better UI for it.

git-svn-id: https://ios.svn.wordpress.org/trunk@4085 7d847f7c-ffe1-4a24-85be-b788d016d96a
Changed the key of the mute setting value to 'mute_until'. props @kokejb.

git-svn-id: https://ios.svn.wordpress.org/trunk@4086 7d847f7c-ffe1-4a24-85be-b788d016d96a
Fix typo

git-svn-id: https://ios.svn.wordpress.org/trunk@4087 7d847f7c-ffe1-4a24-85be-b788d016d96a
Added sharing to reader and WPWebViewController

iOS6 only. On iOS5, the old link action sheet is shown