Been laying some groundwork for shadow mapping re-work in the future. Also fixed a precision bug in directional light shader.
Adding the most important parts of this game.

Signed-off-by: Carl Engström <Lemmibl@gmail.com>
And it comes in .dds, too!
The best, most awesome texture change.
Things happened!
Tweaked directional light a little, changed projection to orthogonal.
Changed back the texture and tweaked day cycle.