Update readme to include a description

Author: pushmatrix

README.md

@@ -1 +1,8 @@
-Check out the [Homepage](http://shopify.github.com/dashing)
+# [Dashing](http://shopify.github.com/dashing)
+
+Dashing is a Sinatra based framework that lets you build beautiful dashboards. It looks especially great on TVs.
+
+[Check out the homepage](http://shopify.github.com/dashing).
+
+# License
+Distributed under the MIT license