Added github issue template

.github/issue_template.md

@@ -0,0 +1,19 @@
+<!-- This is a suggested template for your issue. (remove as you check)     -->
+<!--   * if graphical: also include opengl.txt from pioneer config dir      -->
+<!--     (consult FAQ on wiki for info on how to find opengl.txt).          -->
+<!--   * Please Include version of your last bug-free Pioneer, if possible. -->
+<!--   * Has the issue been reported before? Search the issue tracker.      -->
+<!--   * Perhaps a screenshot illustrates the bug well?                     -->
+<!--   * Feature request? Please consider IRC, player- or dev-forum instead -->
+
+
+### Observed behaviour
+
+
+### Expected behaviour
+
+
+### Steps to reproduce
+
+
+__My pioneer version (and OS):__