Added issue template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,40 @@
+Make sure that you have read the [documentation of Sozi](http://sozi.baierouge.fr),
+and especially the [installation instructions](http://sozi.baierouge.fr/pages/20-install.html)
+and the [frequently asked questions](http://sozi.baierouge.fr/pages/faq.html)
+before reporting an issue.
+Remember that this is not a place to ask questions.
+If you want to get help on Sozi, you can join the [sozi-users discussion group](http://groups.google.com/group/sozi-users).
+
+Describe your problem or propose a new feature in the following sections.
+Keep the headings and replace the paragraphs with your own text.
+
+### Summary of your problem or feature request
+
+Write a short description of your problem.
+
+### Version of Sozi and other relevant software
+
+* Which version of Sozi are you using?
+* Which drawing software did you use? (examples: Inkscape 0.48, LibreOffice Draw 4.2)
+* On which platform? (examples: Windows 7 64-bit, Ubuntu Linux 14.04 32-bit, OS X El Capitan 64-bit)
+* If your problem happens when playing a presentation, which browsers have you tried? (examples: Firefox 46, Chrome 52)
+
+### Steps to reproduce the problem
+
+What did you do to make the problem happen?
+Give enough details to enable us to reproduce the problem.
+
+If you are proposing a new feature, what steps should the user follow to use it?
+
+### Expected behavior
+
+What results did you expect?
+
+### Observed behavior
+
+What results did you actually get?
+
+### Hints and solutions (optional)
+
+* If you have taken the time to investigate the problem, tell us what you have found.
+* If you have ideas on how to fix the problem, please describe them.