progress on adding base layer

old/android/assets/shaders/mesh.vsh

@@ -0,0 +1,13 @@
+attribute vec2 a_position;
+attribute vec4 a_color;
+
+//our camera matrix
+uniform mat4 u_projTrans;
+
+//send the color out to the fragment shader
+varying vec4 vColor;
+
+void main() {
+	vColor = a_color;
+	gl_Position = u_projTrans * vec4(a_position.xy, 0.0, 1.0);
+}