Jetpack: add Jetpack module forks to the list of conflicting plugins to avoid fatal errors
* Jetpack Widget Visibility
* Jetpack Sharing
* Jetpack Omnisearch
* Jetpack Gravatar Hovercards
* Jetpack Widget Visibility
* Widget Visibility Without Jetpack


git-svn-id: https://plugins.svn.wordpress.org/jetpack/trunk@815349 b8457f37-d9ea-0310-8a92-e5e31aec5664