Jetpack: Add an icon font for the Jetpack icon in the WordPress 3.8 menu, and tweak some menu overrides to 
target the proper version.  More post-merge changes to come.


git-svn-id: https://plugins.svn.wordpress.org/jetpack/trunk@806917 b8457f37-d9ea-0310-8a92-e5e31aec5664