Info: Clean up some info files.

Get rid of RELEASE_NOTES since we no longer do releases, update some of the
information in README, and update the date in LICENSE.

src/SConscript

@@ -446,7 +446,7 @@ def makeInfoPyFile(target, source, env):
 
 # Generate a file that wraps the basic top level files
 env.Command('python/m5/info.py',
-            [ '#/AUTHORS', '#/LICENSE', '#/README', '#/RELEASE_NOTES' ],
+            [ '#/AUTHORS', '#/LICENSE', '#/README', ],
             MakeAction(makeInfoPyFile, Transform("INFO")))
 PySource('m5', 'python/m5/info.py')