ISSUE_TEMPLATE.md

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##### System information (version)
<!-- Example
- OpenCV => 3.1
- Operating System / Platform => Windows 64 Bit
- Compiler => Visual Studio 2015
-->

- OpenCV => :grey_question:
- Operating System / Platform => :grey_question:
- Compiler => :grey_question:

##### Detailed description

<!-- your description -->

##### Steps to reproduce

<!-- to add code example fence it with triple backticks and optional file extension
    ```.cpp
    // C++ code example
    ```
 or attach as .txt or .zip file
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