Motion Trails

Adds simple motion (ribbon) trails to Godot 3.0. Supports texturing and start/end colors for fading in/out. This can be used for a variety of special effects.

Instructions:
1. Unzip the contents into a new folder. This folder contains a demo project, and if it is not needed, the MotionTrail subfolder can be copied directly into an existing/new project.
2. Simply drag and drop the MotionTrail.tscn scene onto a parent scene (such as an object in motion), and you should be all set!