Merge pull request #11 from raspygold/master

Accommodate specification of custom port numbers
Version bump to 2.0.1
Using minitest; implementing enumerable on groups
Make bulbs always return in groups, not arrays
Version bump to 2.1.0
README updates
More clear setup steps for registering with the bridge
Use of Mocha was incompatible with 0.13, adding version specification to ~> 0.14
.all now retries the request if the previous request raised an exception
Reload needs to actually overwrite @all
Merge pull request #13 from jcasimir/smoothing_registration

Smoothing Registration
Update groups to use the Huey hub group API