PicoES v0.2.6

• Calling world.initialize() will now pass arguments to initialize.
• Calling world.run() will now pass arguments to pre, post, and the end of every, after the entity parameter.
• Added optional onCreate method to components, which gets called when the component is created. The first parameter is the parent entity.
• Added "get" method to world, which returns an array of matching entities.
• Simplified every() method, got rid of "this" hacks by using "bind".