Add pundit to Gemfile
Implement basic policy
Create Team model
Create relational model TeamUser
Add team_id column to Chart
Add has_many through relations
Annotate models
Add Team & TeamUser creation automatically after sign-up
Enable selecting team in charts form
Modify h tag size
Add routing & controller for Team
Create views for Team
Create header navigation partial
Modify header elements

Move sign-out link from footer to header
Modify c3 override styles
Implement policy_scope for Chart
Only display header for sign-in users
Merge pull request #18 from edwardkenfox/implement_authorization

Implement authorization