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

rakelib/devstack_deprecated.rake

@@ -0,0 +1,25 @@
+# devstack tasks deprecated to paver
+
+require 'colorize'
+
+def deprecated(deprecated, deprecated_by,  *args)
+
+    task deprecated, [:system] do |t,args|
+
+        # Need to install paver dependencies for the commands to work!
+        sh("pip install Paver==1.2.1 psutil==1.2.1 lazy==1.1 path.py==3.0.1")
+
+        args.with_defaults(:system => 'lms')
+        deprecated_by = "#{deprecated_by} #{args.system}"
+
+        puts("Task #{deprecated} has been deprecated. Use #{deprecated_by} instead. Waiting 5 seconds...".red)
+        sleep(5)
+        sh(deprecated_by)
+        exit
+    end
+end
+
+deprecated("devstack:start", "paver devstack --fast")
+deprecated("devstack:assets", "paver update_assets --settings=devstack")
+deprecated("devstack:install", "paver install_prereqs")
+deprecated("devstack", "paver devstack")