improve link in changelog

CHANGELOG.md

@@ -20,3 +20,19 @@
   other user are define to received this comment. ([@alvarobp][])
 - [#453][] Fix ruby 2.0.0 incompatibilities with gem ([@SamSaffron][])
 - [#476][] Fix javascript notifier issue with IE8 ([@sdepold][])
+<!--- The following link definition list is generated by PimpMyChangelog --->
+[#453]: https://github.com/errbit/errbit/issues/453
+[#455]: https://github.com/errbit/errbit/issues/455
+[#457]: https://github.com/errbit/errbit/issues/457
+[#468]: https://github.com/errbit/errbit/issues/468
+[#469]: https://github.com/errbit/errbit/issues/469
+[#474]: https://github.com/errbit/errbit/issues/474
+[#475]: https://github.com/errbit/errbit/issues/475
+[#476]: https://github.com/errbit/errbit/issues/476
+[@SamSaffron]: https://github.com/SamSaffron
+[@adamjt]: https://github.com/adamjt
+[@alvarobp]: https://github.com/alvarobp
+[@chadcf]: https://github.com/chadcf
+[@mildavw]: https://github.com/mildavw
+[@sdepold]: https://github.com/sdepold
+[@shingara]: https://github.com/shingara