Replace rake functions with python paver functions

Deprecated rake functions issue a warning and then call paver
replacements

Bring Paver commands up to date with master for servers, assets, and docs.
Revert deprecation of quality, tests, and i18n for a future pull request.
Deprecate workspace migration

pavement.py

@@ -0,0 +1,4 @@
+import sys
+import os
+sys.path.append(os.path.dirname(__file__))
+from pavelib import *