Added Textures and a map!

Hey guys!

I had some spare time to so I went back to the raycaster and worked on it some more. Many things added here:

* Borrowed some textures from Wolf3D for testing

* Updated map size to 64x64 grid (same as Wolf3D)

* Added E1M1 map copy (no secrets) for testing <-- Made with Tiled. Great editing tool for this type of map system!

* Got the textures working with floor/ceiling/walls

* Took out all the superfluous code/files not needed for this demo (But the scaler is still in there)

* Increased DOF from 8 to 64 to accommodate the larger map.

Things that need fixing:

* Floor/Ceiling textures feel claustrophobic (to me)

* Small cracks in walls/floors/ceiling textures due to micro alignment issues

* Game is made in 16:9 and all the textures are stretched because of this. May need to be defaulted to 4:3

* If you want secrets/doors to work like in Wolf3D good luck. I have no idea how Carmack did those and I don't know if they'll work here.