Update README.md

Added an Issues section with link to the Issue Reporting Guidelines. This is a direct copy from the README of the vuejs/vue repo. Have been seeing many open issues that don't conform to the guidelines.

Author: amirrustam

README.md

@@ -39,3 +39,9 @@ npm run unit
 # run e2e tests only
 npm run e2e-local
 ```
+
+## Issues
+
+Please make sure to read the [Issue Reporting Checklist](https://github.com/vuejs/vue/blob/dev/CONTRIBUTING.md#issue-reporting-guidelines) before opening an issue. Issues not conforming to the guidelines may be closed immediately.
+
+