Fixes #4984, #5001, #5010 - Adding repo enable and disable

Added repo enable /disable

Also added some requested enhancements to the cli.
Changed the use of param feed to param url (by aliasing.)
Also changed the index call to return in the proper API V1 - V2 way.
Merge pull request #3932 from parthaa/repo-commands

Fixes #4984, #5001, #5010 - Adding repo enable and disable