NoTask - removed signals vote post request
NoTask - Added Get signal_groups request
NoTask - Renamed the signals group to groups
NoTask - Fixed rubocop offence
NoTask - Added all API requests for signals
NoTask - Updated one step to /groups/
NoTask - Updated API parameters for all signals endpoint
NoTask - updated method comments following latest commit
NoTask - merged staging branch and fixed conflicts
Merge pull request #120 from Preetamd/signals

NoTask - Added signal groups endpoints