fix: render *

fix:
- fix texture for each direction (north texture is in north etc)
- fix mirror textures (the left of each texture is at its left)
- fix dimensions (walls are 1x1 for any window dimensions or FOV)
- optimize render()

dev:
- add testmaps/good_directions_test.cub
- add textures/test/*.xpm

testmaps/good_directions_test.cub

@@ -0,0 +1,13 @@
+F 255,127,0
+C 0,2,67
+EA textures/test/east.xpm
+NO textures/test/north.xpm
+SO textures/test/south.xpm
+WE textures/test/west.xpm
+    111
+111110111
+10000N001
+111110111
+    101
+    101
+    111