Backported changed to foremancli to stable.

foremancli - Added a .to_s to a restclient call to support older versions of rest-client

Signed-off-by: Brian Gupta <brian.gupta@brandorr.com>

fixes #1297 - expose all searchable collections in foreman CLI

minor updates to foreman CLI

• Updated collections and filterable collections in foremancli
• Updated help for foremancli to add link to wiki and examples

Signed-off-by: Brian Gupta <brian.gupta@brandorr.com>

fixes #945 - Added basic Command Line Interface for foreman

Signed-off-by: Brian Gupta <brian.gupta@brandorr.com>