Assorted edits. Created new shaders.

assets/shaders/singleDiffuseLight/singleDiffuseLight_vert.glsl

@@ -0,0 +1,9 @@
+// Model-view matrix.
+uniform mat4 u_projTrans;
+
+// Vertex position in world coordinates.
+attribute vec4 a_position;
+
+void main(){
+	gl_Position = u_projTrans * a_position;
+}