Removes Scene::getLightColor/setLightColor and Scene::getLightDirection/getLightDirection since scene can have multiple lights.
Removes auto bindings for SCENE_LIGHT_COLOR and SCENE_LIGHT_DIRECTION. They must be set by developer with the preferred light to use.
Changes SceneLoader to ignore loading lightColor and lightDirection properties in a .scene file.
Fixes #1200
Fixes #1201
Merge pull request #1204 from seanpaultaylor/next

Removes Scene::getLightColor/setLightColor and Scene::getLightDirection/...