Add Models for V1

[MarkOates]

Models for V1

✔ = in master

- User
  - username ✔
  - email ✔
  - first_name ✔
  - last_name ✔
  - website ✔
  - description ✔
  - password_digest ✔
  - has_many games ✔

- Game
  - title ✔
  - description ✔
  - has_many users (developers) ✔
  - has_many game_screenshots ✔
  - has_many game_releases ✔

- GameScreenshot
  - image ✔
  - belongs_to game ✔

- GameRelease
  - version_num (unique within game scope) ✔
  - notes ✔
  - belongs_to game ✔
  - has_many game_files ✔

- GameFile
  - file ✔
  - category (MacOS binary, Win binary, Linux binary, Data file, Source files, Other) ✔
  - belongs_to game_release ✔

Rudimentary Models

• [x] Add rudimentary User model - #2
• [x] Add rudimentary Game model - #11
• [x] Add rudimentary GameScreenshot model - https://github.com/allegroplanet/allegro-planet/pull/12
• [X] Add rudimentary GameRelease model - https://github.com/allegroplanet/allegro-planet/pull/19
• [X] Add rudimentary GameFile model - https://github.com/allegroplanet/allegro-planet/pull/20

Associations

• [x] Add associations between User <-> Game models - in https://github.com/allegroplanet/allegro-planet/pull/13
• [X] Add associations between Game <-> GameScreenshot models - https://github.com/allegroplanet/allegro-planet/pull/12
• [X] Add associations between Game <-> GameRelease models - https://github.com/allegroplanet/allegro-planet/pull/19
• [X] Add associations between GameFile <-> GameRelease models - https://github.com/allegroplanet/allegro-planet/pull/20

[MarkOates]

🎉