Mod5

## Feature spec
- user_following_people_spec

## Unit and functional tests
- relationship_controllers_spec
- relationship_spec
- additions to user_spec for model methods

## Relationships
- relationships table added to schema
- users#show page
- people (Relationships#index) page
- follow and unfollow relationships using self referential associations

## Seed
- update seed data to include relationships, more users, videos and queue_items

## Macros
- click_on_video_on_home_page