created a template for github issues

ISSUE_TEMPLATE.md

@@ -0,0 +1,50 @@
+<!--
+Before submitting an issue, consider looking into our
+wiki ( https://github.com/FluidSynth/fluidsynth/wiki )
+   or the
+developer resources ( http://www.fluidsynth.org/api/ )
+
+Please do not submit support requests or "How to" questions here.
+Instead, please use FluidSynth's mailing list:
+https://lists.nongnu.org/mailman/listinfo/fluid-dev
+-->
+
+### FluidSynth version <!-- enter FluidSynths version you're using -->
+1.1.x
+
+### I'm submitting a ... <!-- check one like [x] -->
+- [ ] bug report
+- [ ] feature request
+
+### Current behavior
+<!-- Describe the current situation, i.e. how the bug manifests. -->
+
+### Expected behavior
+<!-- Describe what the behavior would be without the bug or how the
+     feature request would make your life easier. -->
+
+### Steps to reproduce
+<!--  Please explain the steps required to duplicate the issue,
+      esp. if you are able to provide a sample application. -->
+
+### Related code
+<!-- If you are able to illustrate the bug or feature request with an
+     example, please provide simple source code here, or as attatched file -->
+
+```
+if available, insert short code snippets here
+```
+
+### Other information
+<!-- List any other information that is relevant to your issue:
+  Stack traces,
+  related issues,
+  full build logs,
+  suggestions on how to fix,
+  Stack Overflow links,
+  forum links,
+  etc. -->
+
+```
+insert anything relevant here, or attach it as extra file(s) if it's too much
+```