Add issue template

Author: njoyard

CONTRIBUTING.md renamed to .github/CONTRIBUTING.md

@@ -0,0 +1,32 @@
+<!-- Please fill the following template -->
+
+### Version information
+
+* fluent-ffmpeg version:
+* ffmpeg version:
+* OS:
+
+### Code to reproduce
+
+```js
+
+
+```
+
+(note: if the problem only happens with some inputs, include a link to such an input file)
+
+### Expected results
+
+
+
+### Observed results
+
+
+
+### Checklist
+
+<!-- you may delete that checklist when you have checked everything -->
+
+* [ ] I have read the [FAQ](https://github.com/fluent-ffmpeg/node-fluent-ffmpeg/wiki/FAQ)
+* [ ] I tried the same with command line ffmpeg and it works correctly (hint: if the problem also happens this way, this is an ffmpeg problem and you're not reporting it to the right place)
+* [ ] I have included full stderr/stdout output from ffmpeg