Add issue template

Author: mccalluc

ISSUE_TEMPLATE.md

@@ -0,0 +1,17 @@
+* Release number or git hash: 
+* Web browser version and OS: 
+* Environment (local or deployed): 
+
+### Steps to reproduce
+
+1. 
+2. 
+
+### Observed behavior
+* Any unexpected output or action (or lack of expected output or action)
+* Web browser console errors (including tracebacks)
+* Server errors (relevant messages and tracebacks)
+* Static or animated images showing the UI behavior
+
+### Expected behavior
+*