Added the MIT License

Author: Stephen Reid

README.rdoc

@@ -79,4 +79,21 @@ Performing API calls across the internet is inherently unsafe, so be sure to cat
     #   - socket broke before the request was completed
     #   - pi.pardot.com is under heavy load
     #   - many number of other reasons
-  end
+  end
+
+=== License
+The MIT License (MIT)
+Copyright (c) 2012 Pardot
+
+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.