Template for issues and pull-request

I've noticed that many issues are answered with "Please provide a jsfiddle".
This issue template tells the reporter to do that from the start.

.github/ISSUE_TEMPLATE.md

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+Before filing issues, please check the following points first:
+
+- [ ] Have a look at https://github.com/wycats/handlebars.js/blob/master/CONTRIBUTING.md
+- [ ] Read the FAQ at https://github.com/wycats/handlebars.js/blob/master/FAQ.md
+- [ ] Use the jsfiddle-template at https://jsfiddle.net/9D88g/47/ to reproduce problems or bugs
+
+This will probably help you to get a solution faster. 
+For bugs, it would be great to have a PR with a failing test-case.
+
+

.github/PULL_REQUEST_TEMPLATE.md

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+Before creating a pull-request, please check https://github.com/wycats/handlebars.js/blob/master/CONTRIBUTING.md first.
+
+Generally we like to see pull requests that
+
+- [ ] Maintain the existing code style
+- [ ] Are focused on a single change (i.e. avoid large refactoring or style adjustments in untouched code if not the primary goal of the pull request)
+- [ ] Have good commit messages
+- [ ] Have tests
+- [ ] Don't significantly decrease the current code coverage (see coverage/lcov-report/index.html)
+
+