Adding "social-connect" submodule/ WP plugin - requested by Rob F.

* http://wordpress.org/plugins/social-connect -- v1.0.5
* "...comment, login and register with [your] Twitter, Facebook... or WordPress.com account."
* https://github.com/wp-plugins/social-connect/releases/tag/1.0.5
* https://github.com/wp-plugins/social-connect/commit/aff4c6deb161b20b (tag)
* https://github.com/wp-plugins/social-connect/commit/8645f90269a36a2b (code)
Adding "jetpack" submodule/ WP plugin - requested by @mhawksey

* http://wordpress.org/plugins/jetpack - v2.9.1
* "(convienient bundle of add-ins maintained by Automatic)"
* https://github.com/wp-plugins/jetpack/releases/tag/2.9.1
* https://github.com/wp-plugins/jetpack/commit/8b2b158e4036fd16bba9193 (tag)
* https://github.com/wp-plugins/jetpack/commit/c6fc245cd23c2072bc90dd7 (code)