docs(github): Clarify issue template

Author: STRML

.github/ISSUE_TEMPLATE.md

@@ -1,10 +1,3 @@
-Thanks for submitting an issue to RGL!
+Please only submit bugs to this tracker. If you have a feature request, please implement it. This is free software and the author is busy with other projects.
 
-Please mark the type of this issue:
-
-- [ ] Bug
-- [ ] Feature Request
-- [ ] Question
-
-If you have a question or bug report, please use the [WebpackBin Template](https://www.webpackbin.com/bins/-Kvr2qCxorvGMgVMxkmI)
-to demonstrate. It is much easier for us to help you if you do.
+Please use the [WebpackBin Template](https://www.webpackbin.com/bins/-Kvr2qCxorvGMgVMxkmI) to demonstrate your bug. It is much easier for us to help you if you do.