readme: improve the readme with some base exemple

README.md

@@ -1,3 +1,64 @@
 # gamecore
 
-A basic love2D game core system
+Gamecore aim to be an integrated, simple core system for love2D. It aim to make work in a integrated way several managers to automatically handle inputs, screen, and several utilities to make game developpement easier and less repetitive.
+
+Gamecore use [Classic](https://github.com/rxi/classic/) as its base Object
+
+## How to load GameCore
+
+To load gamecore, you basically need the following code.
+
+````
+utils   = require "libs.loveutils"
+Object  = require "libs.classic"
+Core    = require "core"
+
+scenes  = require "scenes"
+
+function love.load()
+  core = Core()
+end
+
+function love.update(dt)
+  core:update(dt)
+  game:update(dt)
+end
+
+function love.draw()
+  core:draw()
+end
+
+function love.mousemoved(x, y, dx, dy)
+  core:mousemoved(x, y, dx, dy)
+end
+
+function love.mousepressed( x, y, button, istouch )
+  core:mousepressed(x, y, button, istouch)
+end
+````
+
+Then you have to create some scene object,
+
+## Gamecore managers
+
+- Debug
+
+- Input
+
+- Lang
+
+- Options
+
+- Screen
+
+- Scene Manager
+
+## GameCore modules
+
+Modules are utilies that you can load everywhere in your code and that aren't loaded specifically inside the core.
+
+- Scene Object
+
+- Assets
+
+- Menu System