Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+<!--
+If you have a question rather than reporting a bug please go to http://project-10.de/forum/viewforum.php?f=31 where you get much faster responses.
+
+Please:
+* Read the documentation to test with the latest developer build.
+* Check if other person has already created the same issue to avoid duplicates. You can comment on it if there already is an issue.
+* Try to be as detailed as possible in your report.
+* Report only one problem per created issue.
+
+This is a template helping you to create an issue which can be processed as quickly as possible. This is the bug reporting section for the DGM library.
+-->
+
+**System information (version):**
+- DGM: [e.g. 1.6.0]
+- OpenCV: [e.g. 3.4]
+- OS: [e.g. Windows 10 64bit]
+- Compiler: [e.g. Visual Studio 2017]
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Steps To Reproduce**
+Steps to reproduce the behavior
+<!-- to add code example fence it with triple backticks and optional file extension
+    ```.cpp
+    // C++ code example
+    ```
+ or attach as .txt or .zip file
+-->
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Additional context**
+Add any other context about the problem here.