Added api for adding and removing security groups
Removed resolves todo comments
Changed the lb api to work with the new security group api

Conflicts:
	dcmgr/lib/dcmgr/endpoints/12.03/load_balancers.rb
Fixed a bug where lb security groups were deleted when manually editing the std security groups of a registered instance
Changed the temporary puts into a proper logger message
Merge pull request #188 from axsh/cleanup-network-secgroup-api

Fix security group api