Added username validation for uniqueness
Merge pull request #38 from alexanderdavidpan/Validations

Added username validation for uniqueness
Added seed data for SurveyedUsers and Responses
Merge pull request #39 from alexanderdavidpan/update_seed

Added seed data for SurveyedUsers and Responses
Merge pull request #40 from alexanderdavidpan/Results

Added chartkick funtionality
Updated seed answers to make them more random