Move resources in separate directory
Rename resources because from now on it holds only the constants
Start Resources::Loader from scratch
Add more necessary constants
Delete leftover images
Restructure the assets to match the new Resources::Loader
Fix some of the constants
Make the Loader work
Add a file requiring everything in the Resources module
Update the Game according to the new Loader
Bullet dispenser should have update method
Add BulletDispenser renderer so drawing bullets is cleaner
Add class to manage the resources and provide size information
Update the spaceship controls to match with the README
Rearrange settings constants more conveniently
DRY up the code in GosuGui::Game
Fix typo
Fix Resources::Manager#size
Switch to the other, more attractive spaceship
Change Resources::Manager#size so it takes an arbitrary object