Issue Templates: bug reports and feature requests

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+1. PLEASE CAREFULLY READ: [Wiki](https://github.com/Nelarius/imnodes/wiki)
+
+2. PLEASE MAKE SURE that you have: read the comments in [imnodes.h](https://github.com/Nelarius/imnodes/blob/master/imnodes.h); explored the [example](https://github.com/Nelarius/imnodes/tree/master/example); searched among Issues; and read the link provided in (1).
+
+3. Be mindful that messages are being sent to the e-mail box of "Watching" users. Try to proof-read your messages before sending them. Edits are not seen by those users.
+
+4. Delete points 1-4 and PLEASE FILL THE TEMPLATE BELOW before submitting your issue or we will immediately close it.
+
+Thank you!
+
+----
+
+## Version of imnodes
+
+Version (or commit): XXX
+Operating System: XXX (Windows 10, macOs xx, Ubuntu 20.04, etc.)
+Graphics API: XXX (Directx11, Metal, OpenGL 3, etc.)
+
+## My Issue/Question
+
+A clear and concise description of what the issue/question is. Please provide as much context as possible.
+
+## To Reproduce
+
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+## Expected behavior
+
+A clear and concise description of what you expected to happen.
+
+## Screenshots/Video
+
+XXX _(you can drag files here)_
+
+## Standalone, minimal, complete and verifiable example
+
+```cpp
+// Here's some code anyone can copy and paste to reproduce your issue
+ImGui::Begin("Testing");
+
+    imnodes::BeginNodeEditor();
+
+    imnodes::BeginNode(53);
+    ImGui::Dummy(ImVec2(80.0f, 45.0f));
+    imnodes::EndNode();
+
+    imnodes::EndNodeEditor();
+
+
+ImGui::End();
+```

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.