Add ISSUE_TEMPLATE.md

Author: Kwiboo

ISSUE_TEMPLATE.md

@@ -0,0 +1,11 @@
+<!--
+Thanks for reporting issues back to OpenPHT!
+To make it possible for us to help you please fill out the information below carefully.
+-->
+
+[Tell us about your issue, steps to reproduce, expected and actual behavior]
+[Always attempt to reproduce your issue in the default skin]
+[Enable debug logging in preferences and insert a link to your log-file]
+
+**OpenPHT**: [version, skin and operating system]
+**PMS**: [version and operating system]