Sprite uses unique vao for rendering

Remove notation of "m" in member variables.

data/shaders/sprite.frag.glsl

@@ -3,9 +3,9 @@ in vec2 texCoord;
 
 out vec4 color;
 
-uniform sampler2D texture;
+uniform sampler2D tex;
 
 void main()
 {
-	color = texture(texture, texCoord);
+	color = texture(tex, texCoord);
 }