Starts to implement deprecation logic.
Updates README.md.
Updates TODO.md.
Adds a bit finer deprecation logic and info log.
Adds more generalized #update for game.
Merge branch 'feature/deprecation' into develop
Starts to upgrade to PIXI.js
Removes sprite.js.
Fixes timeOut variable definitions.
Stop browser to respond on game event keys.
Adds health image for pixi.js rendering.
Removes doc directory, it was not the conventional way.
Updates TODO.md
Reverses CHANGELOG.md entries.
Adds health image to server/config.js.
Fixes issue with pixi.js drawing.
Rewrites NOTES.md
Cleaning unuseful code.
Starts to use seperate graphics class inside game.
Adds GraphicsService to decouple Game model.

- fixes issues along the refactoring