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
Added -p option to the list command. This alows filtering results by
supported platforms, e.g.
wa list workloads -p linux
Also adding missing supported_platforms attribute to various extensions.
If an extension does not have this attribute, the assumption is that it
is supported by all available platforms.
