add ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

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+<!--
+
+If you’re filing a bug, please provide the following information:
+-->
+
+__How often can you reproduce it?__ <!-- Use [x] to mark your choice. -->
+
+- [ ] Always
+- [ ] Sometimes
+- [ ] Rarely
+- [ ] Unable
+- [ ] I didn’t try
+
+<!-- Please provide a detailed description of the issue. Include specific details to help us understand the problem. -->
+
+__Description:__
+
+
+
+<!-- List the step-by-step process to reproduce the issue. -->
+
+__Steps to reproduce:__
+
+1. Include a JS Bin (or equivalent) link if possible. [You can use this as a starting point](http://jsbin.com/guresequba/edit?js,output)
+2. Detail the exact steps taken to produce the problem
+3. Include a gif if possible; you can use LICEcap to make a gif: http://www.cockos.com/licecap/
+4. Check the browser console for errors (Use F12 to access the console)
+
+<!-- Describe what you expected to have happen after completing the steps above. -->
+
+__Expected results:__
+
+
+
+<!-- Describe what actually happened after completing the steps above. -->
+
+__Actual results:__
+
+
+
+<!-- Include details about your environment. -->
+
+__Environment:__
+
+| Software                | Version
+| ------------------ | -------
+| CMV Version | 
+| Browser                 |
+| Operating system |