Jetpack: WPCC: Initial commit of WPCC to Jetpack, props @donncha, @blobaugh, @jkudish, @nbachiyski, @georgestephanis

git-svn-id: https://plugins.svn.wordpress.org/jetpack/trunk@753569 b8457f37-d9ea-0310-8a92-e5e31aec5664