pluginloader: Replaced extension loader with WA3 plugin loader

In the process removed modules and boot_strap.py. Also Renamed extensions Plugins.

Louie is now monkey patched rather than containing a modified version in external

wlauto/managers/__init__.py

@@ -0,0 +1,14 @@
+#    Copyright 2014-2015 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#