Merge pull request #820 from ericsnowcurrently/backups-get

Add the Backups Get/Info method.
Add the backups remove method.
Add the API endpoint for remove.
Add the API method for remove.
Add the backups remove subcommand.
Fix gocheck imports.
Adjust to baseSuite.
Add the backups list method.
Add the backups API endpoints for list.
Add the API client methods for list.
Add the backups list subcommand.
Fix gocheck imports.
Adjust to baseSuite.