Update issue templates

Author: yGuy

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve the demos
+
+---
+
+**Delete this heading**
+Delete this heading to show that you have understood that this github repository is not meant to provide you with support regarding *your own* code. This bug report is meant to report an issue with the unmodified sources that are part of *this* project and not part of the yFiles library.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**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**
+If applicable, add screenshots to help explain your problem.
+
+**Browser (please complete the following information):**
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22.42]
+ - OS: [e.g. Windows]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for an existing or a new demo
+
+---
+
+**Delete this heading**
+Delete this heading to show that you have understood that this github repository is not meant to provide to collect feature requests for the yFiles library but only to collect feature requests regarding demos in this repository. This feature request is meant to request an improvement for an existing or as an idea for a new demo that uses the yFiles library.
+
+**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.

.github/ISSUE_TEMPLATE/support-request.md

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+---
+name: Support Request
+about: Request support for help with the demos
+
+---
+
+**Delete this heading**
+Delete this heading to show that you have understood that this github repository is not meant to provide you with support regarding *your own* code or questions that come up during your evaluation of the yFiles libraries. Support requests will be deleted from the issue tracker. If you require support, contact the yFiles support team using the methods described in the evaluation package.
+
+**What kind of help with the demos do you need**
+If this is a bug report or feature request, please use the other templates. If you need help with the exact files in this repository which only affects the files here and not the (identical) ones in the evaluation package, feel free to provide more information here:
+
+**Is your support 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.