change association for trainer_profiles and locations

originally was a many to many. Changed to: trainer_profile has_many
locaitons, location belongs_to trainer_profile
Complete assocation transistion

complete transition from locaiton has_many trainer_profiles to location
belongs_to trainer_profile. Tests green.
refactor gmaps info_window method
refactor trainer profile boxes to account for multiple locaitons
Merge pull request #34 from linstula/refactor_locations

Refactor locations - change location has_many trainer_profiles to location belongs_to trainer_profile