Merge pull request #5916 from CocoaPods/orta-improve-issue

Update ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

@@ -3,6 +3,13 @@
 > what info we expect.  
 > Please remove this line and all above before submitting.
 
+> Before you start, are you using the CocoaPods beta release?
+> a lot has changed with Xcode 8 that is not backwards compatible.
+>
+> Xcode 8 Status: Only works with CocoaPods 1.1.0
+> Swift 3: You need to add a `.swift-version` file, see the CHANGELOG
+> China: Use https://gems.ruby-china.org/ instead of https://gems.ruby-china.org/ for the RC see #5910
+
 * [ ] I've read and understood the [*CONTRIBUTING guidelines and have done my best effort to follow](https://github.com/CocoaPods/CocoaPods/blob/master/CONTRIBUTING.md).
 
 # Report