Texture refactor

-Texture renamed to Texture2D
-TextureLayered as base now inherits 2Darray, cubemap and cubemap array
-Removed all references to flags in textures (they will go in the shader)
-Texture3D gone for now (will come back later done properly)
-Create base rasterizer for RenderDevice, RasterizerRD

servers/camera/camera_feed.h

@@ -103,7 +103,10 @@ public:
 	void set_RGB_img(Ref<Image> p_rgb_img);
 	void set_YCbCr_img(Ref<Image> p_ycbcr_img);
 	void set_YCbCr_imgs(Ref<Image> p_y_img, Ref<Image> p_cbcr_img);
+// FIXME: Disabled during Vulkan refactoring, should be ported.
+#if 0
 	void allocate_texture(int p_width, int p_height, Image::Format p_format, VisualServer::TextureType p_texture_type, FeedDataType p_data_type);
+#endif
 
 	virtual bool activate_feed();
 	virtual void deactivate_feed();