Create ISSUE_TEMPLATE.MD

Author: bsavery

.github/ISSUE_TEMPLATE.MD

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+Every issue should include 3 things:
+1.  System setup (GPU, CPU, OS version, Blender version)
+2.  * Most ideally * a scene to reproduce this simply.  SCREENSHOTS ARE NOT A SCENE FILE
+3.  What the expected behavior or effect is.  If possible include the error message.  
+
+You can get more information on the error message by opening Window -> Show System Console from blender and copying that text here.  On MacOS launch Blender from the Terminal.
+
+
+<!--- Provide a general summary of the issue in the Title above -->
+
+## Issue
+<!--- Tell us what happens instead of the expected behavior -->
+
+## Steps to Reproduce
+<!--- Provide a scene file to reproduce this bug. -->
+<!--- Or steps to reproduce if it happens with live rendering -->
+
+## System Setup (Environment)
+<!--- OS version -->
+<!--- GPU, CPU and driver version -->
+<!--- Blender version -->
+<!--- If using CPU or GPU rendering -->
+
+## Detailed Description
+<!--- Provide a detailed description of the change or addition you are proposing -->
+