Update ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

@@ -3,6 +3,12 @@
 > 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
+
 * [ ] 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