Implement basic endpoints from the realworld API

[colinbankier]

Implement endpoints from https://github.com/gothinkster/realworld/tree/master/api Implementation details, application structure, etc can be refactored/improved later.

[oddg]

This is the current state of the app in this regard

• [x] User resource
  • [x] POST /api/users/login
  • [x] POST /api/users
  • [x] GET /api/user
  • [x] PUT /api/user
• [x] Profile resource
  • [x] GET /api/profiles/:username
  • [x] POST /api/profiles/:username/follow
  • [x] DELETE /api/profiles/:username/follow
• [x] Article resource
  • [x] GET /api/articles
  • [x] GET /api/articles/feed
  • [x] GET /api/articles/:slug
  • [x] POST /api/articles
  • [x] PUT /api/articles/:slug
  • [x] DELETE /api/articles/:slug
  • [x] POST /api/articles/:slug/comments
  • [x] GET /api/articles/:slug/comments
  • [x] DELETE /api/articles/:slug/comments/:id
  • [x] POST /api/articles/:slug/favorite
  • [x] DELETE /api/articles/:slug/favorite
• [x] Tag resource
  • [x] GET /api/tags

[LukeMathWalker]

We can close this one - the spec has been fully implemented.

[colinbankier]

Confirming all tests in the realworld api tests pass :+1: