Add convenience method.
Add test. Adjust class.
Use constant.
Re-use existing method.
Add doc.
Wording.
Remove obsolute import.
Adjust method doc. Validate required arguments.
Throw an error if multiple channels with same key were found.
Use better method name.
Use _get for issueing request.
Refactor argument validation error handliing.
Add unit tests.
Adjust doc.
Add TOC.
Fix call.
Ensure params are default ones.
Merge branch 'channels' of github.com:sphereio/sphere-node-client into channels
Merge pull request #23 from sphereio/channels

Channel convenience method