Add links to glitch.me template using polyserve. Fixes #5016

.github/ISSUE_TEMPLATE.md

@@ -9,8 +9,8 @@ If you are asking a question rather than filing a bug, try one of these instead:
 <!-- Example: Error thrown when calling `appendChild` on Polymer element -->
 
 #### Live Demo
-<!-- Fork this JSBin, or provide your own URL -->
-http://jsbin.com/luhaxab/1/edit
+<!-- Fork this glitch, or provide your own URL -->
+https://glitch.com/edit/#!/polymer-repro?path=my-element.html:2:0
 
 #### Steps to Reproduce
 <!--

CONTRIBUTING.md

@@ -42,7 +42,7 @@ If you find an issue, please do file it on the repository. The [Polymer/polymer
 
 For issues with elements the team maintains, please file directly on the element's repository. If you're not sure if a bug stems from the element or the library, air toward filing it on the element and we'll move the issue if necessary.
 
-Please file issues using the issue template provided, filling out as many fields as possible. We love examples for addressing issues - issues with a Plunkr, jsFiddle, or jsBin will be much easier for us to work on quickly. You can start with [this jsbin](http://jsbin.com/luhaxab/edit) which sets up the basics to demonstrate a Polymer element.
+Please file issues using the issue template provided, filling out as many fields as possible. We love examples for addressing issues - issues with a glitch.me, Plunkr, jsFiddle, or jsBin repro will be much easier for us to work on quickly. You can start with [this glitch](https://glitch.com/edit/#!/polymer-repro?path=my-element.html:2:0) which sets up the basics to demonstrate a Polymer element and serves the source via polyserve for automatic transpilation.
 
 Occasionally we'll close issues if they appear stale or are too vague - please don't take this personally! Please feel free to re-open issues we've closed if there's something we've missed and they still need to be addressed.