Rhod::Backoff syntax sugar for setting up backoff rates, makes for a short API call
Add tests for syntax sugar of backoffs integration to Rhod::Command

Add tests to verify Rhod::Command uses backoffs
Add Symbols to backoff syntax sugar.

Update Readme to match new API feature
Add tests for symbols to backoff syntax sugar
Merge pull request #2 from dinedal/feature/backoff_syntax_sugar

Feature/backoff syntax sugar