Content Update

-Updated to use Play 2.2.0 and SBT 0.13.0.
-Changed to use ScalaTest 2.0.RC1.
-Updated About with latest GitHub info.
-Added build instructions to About.
-Added more people to list that helped ScalaTest.
-Updated Community with GitHub url, and open external link in new tab/window.
-Changed maven plugin version to 1.0.M2 in example given for using the maven plugin.