add focus group to isolate examples and ensure default group is run if no command line overrides
add focus group to isolate examples and ensure default group is run if no command line overrides

https://www.relishapp.com/rspec/rspec-core/v/2-12/docs/command-line/tag-option 
to run the focus specs use: 
bundle exec guard -g focus --no-interactions
zooniverse/Panoptes,marten/Panoptes,parrish/Panoptes,rogerhutchings/Panoptes,camallen/Panoptes,rogerhutchings/Panoptes,marten/Panoptes,astopy/Panoptes,camallen/Panoptes,astopy/Panoptes,edpaget/Panoptes,srallen/Panoptes,zooniverse/Panoptes,astopy/Panoptes,marten/Panoptes,camallen/Panoptes,camallen/Panoptes,srallen/Panoptes,zooniverse/Panoptes,marten/Panoptes,rogerhutchings/Panoptes,edpaget/Panoptes,rogerhutchings/Panoptes,edpaget/Panoptes,parrish/Panoptes,astopy/Panoptes,edpaget/Panoptes,parrish/Panoptes,srallen/Panoptes,zooniverse/Panoptes,srallen/Panoptes,parrish/Panoptes