Add a readme.md to display neatly on GitHub

Our readme.txt is aimed to match the WordPress.org plugins standard,
and is a bit cluttered for generating the GitHub readme.  This is a
tidied up version!  Fixes #5, thanks to @maxme for the reminder.

readme.md

@@ -0,0 +1,64 @@
+## Jetpack
+
+[Jetpack](http://jetpack.me/) is a WordPress plugin that supercharges your self-hosted WordPress site with the awesome cloud power of WordPress.com.
+
+For more information, check out [Jetpack.me](http://jetpack.me/).
+
+## Please Excuse the Mess!
+
+We're currently in the process of migrating to this GitHub repository, and may have some growing pains. Please bear with us!
+
+## Team
+
+The Jetpack Pit Crew is comprised of @georgestephanis, @lessbloat, @lezama, @blobaugh, and @cathyjf.
+
+Legacy contributions (that may not be credited properly due to the import from SVN) have been made by dozens of other Automatticians, like:
+
+* @aliso
+* @allendav
+* @alternatekev
+* @apeatling
+* @azaozz
+* @bazza
+* @beaulebens
+* @cfinke
+* @daniloercoli
+* @eoigal
+* @ethitter
+* @gibrown
+* @hugobaeta
+* @jasmussen
+* @jblz
+* @jeherve
+* @jkudish
+* @johnjamesjacoby
+* @justinshreve
+* @kovshenin
+* @lancewillett
+* @martinremy
+* @mtias
+* @mcsf
+* @mdawaffe
+* @nickmomrik
+* @obenland
+* @pento
+* @skeltoac
+* @stephdau
+* @tmoorewp
+* @Viper007Bond
+* @xyu
+* @yoavf
+
+Our _awesome_ happiness engineers are @jeherve, @richardmtl, @csonnek, @rcowles, and [Deborah Beckett](https://twitter.com/dbeckettnc)
+
+Interested in working on awesome open-source code all day? Join us!
+
+## Contributors
+
+We're currently migrating over existing issues from [WordPress.org Plugins Trac](http://plugins.trac.wordpress.org/report/9?COMPONENT=jetpack), so if you had one there, we should be recreating it here.
+
+Pull requests are always welcome!
+
+## License
+
+[GPLv2+](http://www.gnu.org/licenses/gpl-2.0.html)