Tower -> AWX Tooling Migration

* Switching version number scheme and mechanism
* Refactor development tooling towards 'awx' paths and names
* Purging packaging details from Makefile

awx/main/utils/common.py

@@ -157,7 +157,7 @@ def get_awx_version():
     from awx import __version__
     try:
         import pkg_resources
-        return pkg_resources.require('ansible_tower')[0].version
+        return pkg_resources.require('ansible-awx')[0].version
     except:
         return __version__