Feature modules added
Added Diff, Features Plumber, and override panoply admin modules

Signed-off-by: Elena Reeves-Walker <elena@tchopshop.com>
Patched features override

Signed-off-by: Elena Reeves-Walker <elena@tchopshop.com>
Added monopoly blog and panopoly override features

Signed-off-by: Elena Reeves-Walker <elena@tchopshop.com>