Remove the content option.

The value of content is populated based on the file parameter which is used
Ping was not working because it was not inheriting from the foreman commands.

Created a new ReadCommand for Katello which inherits from the foreman command.
Subclassed ping command from the new ReadCommand
Merge pull request #35 from bkearney/bkearney/hide-option-in-subscription

Remove the content option.
Merge pull request #57 from bkearney/bkearney/get-ping-to-work

Ping was not working because it was not inheriting from the foreman comm...
CI: Migrating to Travis
Merge pull request #66 from daviddavis/temp/20140220104848

CI: Migrating to Travis
here's a boilerplate set of commands for a katello object
Merge pull request #46 from komidore64/boilerplate

here's a boilerplate set of commands for a katello object
repository sets - list, enable, and disable commands
Merge pull request #63 from komidore64/repo-sets

repository sets - list, enable, and disable commands
README: Adding better install instructions
Merge pull request #71 from daviddavis/temp/20140220121310

README: Adding more thorough install instructions
README: Remove verbage about gems being viable for development
Merge pull request #73 from daviddavis/temp/20140221075749

README: Remove verbage about gems being viable for development
Support ids and names.

The checkin shows examples with the environment commnads. You include one module and it just works(tm).
This commit also contains a new path command which requires pull request
https://github.com/Katello/katello/pull/3720 to work.
Merge pull request #72 from bkearney/bkearney/ids_and_nams

Support ids and names.
Show more data in the susbcription list
Update the fields based on new json
Add delete and refresh commands to the cli