Add issue template to add structure to issue reporting

issue_template.md

@@ -0,0 +1,23 @@
+### Steps to reproduce
+1.
+2.
+3.
+
+### Expected behaviour
+Tell us what you expect should happen
+
+### Actual behaviour
+Tell us what happens instead
+
+### Version information
+**Operating system**:
+
+**hackrf_info output:**
+
+If you are reporting a problem that involves third party software 
+(GNU Radio, Gqrx, etc), please report the version here.
+
+### Output
+```
+Insert any commandline or build output here
+```