-Implemented Proxy Textures (needed to solve the problem with ViewportTexture)

-Properly use hierarchy to initialize resources local to scene (solves problem of GUI in 3D)

servers/visual/rasterizer.h

@@ -193,6 +193,8 @@ public:
 
 	virtual void textures_keep_original(bool p_enable) = 0;
 
+	virtual void texture_set_proxy(RID p_proxy, RID p_base) = 0;
+
 	/* SKY API */
 
 	virtual RID sky_create() = 0;

servers/visual/visual_server_raster.h

@@ -168,6 +168,8 @@ public:
 
 	BIND1(textures_keep_original, bool)
 
+	BIND2(texture_set_proxy, RID, RID)
+
 	/* SKY API */
 
 	BIND0R(RID, sky_create)

servers/visual/visual_server_wrap_mt.h

@@ -100,6 +100,8 @@ public:
 
 	FUNC1(textures_keep_original, bool)
 
+	FUNC2(texture_set_proxy, RID, RID)
+
 	/* SKY API */
 
 	FUNCRID(sky)