Add github issue template

Author: joto

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,48 @@
+---
+name: Report problems with the software
+about: You found a (possible) bug in libosmium
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## What version of libosmium are you using?
+
+<!-- Please use the [latest
+release](https://github.com/osmcode/libosmium/releases) or master if at all
+possible. -->
+
+
+## What operating system and compiler are you using?
+
+<!-- Also what Linux distribution if applicable, OS version? -->
+
+
+## Tell us something about your system
+
+<!-- How much RAM do you have, how many CPUs, bare metal or cloud setup? -->
+
+
+## What did you do exactly?
+
+<!-- Please provide the command(s) you used including all options etc. Include
+links to input files. -->
+
+
+## What did you expect to happen?
+
+<!-- Describe in detail what you expected the above would do. -->
+
+
+## What did happen instead?
+
+<!-- Please describe what happened and why you think this is wrong. Please
+include (or link to, if it is too verbose) the log output. -->
+
+
+## What did you do to try analyzing the problem?
+
+<!-- Describe what steps you already did to try analyzing the problem before
+reporting. -->
+