Update Credits and add LICENSE file

* Add MIT license file
* Add Credits section with copyright and contributors link

LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011-2012 thoughtbot, inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

@@ -43,3 +43,20 @@ What it sets up
 * Tmux for saving project state and switching between projects
 
 It should take less than 30 minutes to install (depends on your machine).
+
+Credits
+-------
+
+![thoughtbot](http://thoughtbot.com/images/tm/logo.png)
+
+Laptop is maintained and funded by [thoughtbot, inc](http://thoughtbot.com/community).
+
+Thank you to all [the contributors](https://github.com/thoughtbot/laptop/contributors)!
+
+The names and logos for thoughtbot are trademarks of thoughtbot, inc.
+
+License
+-------
+
+Laptop is Copyright © 2011-2012 thoughtbot, inc. It is free software, and may be
+redistributed under the terms specified in the LICENSE file.