Adds support for dynamic chunk shadows via shadow maps and adds the new "Uber" graphics quality setting in that regard ("Uber" enables the water simulation plus shadows, light shafts are available with "Insane").

* Fixes torches in combination with meshes
* Adds new orthographic camera for the shadow rendering
* Tweaks non-ocean water
* Renames Shader class to MaterialShader
* Removes strange camera modes from the material shader
* Adds (currently deactivated) shadow support to the mesh and dropped item renderer
* Tweaks various other rendering related things
* Disables alpha blending of chunk elements until further notice