Add issue and pull request template

.github/CONTRIBUTING.md

@@ -46,11 +46,11 @@ Please read detailed information on [Wiki](https://github.com/gogits/gogs/wiki/C
 
 ### Ask For Help
 
-Before opening an issue, please make sure your problem isn't already addressed on the [Troubleshooting](http://gogs.io/docs/intro/troubleshooting.md) and [FAQs](http://gogs.io/docs/intro/faqs.html) pages.
+Before opening an issue, please make sure your problem isn't already addressed on the [Troubleshooting](http://gogs.io/docs/intro/troubleshooting.html) and [FAQs](http://gogs.io/docs/intro/faqs.html) pages.
 
 ## Things To Notice
 
-Please take a moment to check that an issue on [GitHub](https://github.com/gogits/gogs/issues) or card on [Trello](https://trello.com/b/uxAoeLUl/gogs-go-git-service) doesn't already exist documenting your bug report or improvement proposal. If it does, it never hurts to add a quick "+1" or "I have this problem too". This will help prioritize the most common problems and requests.
+Please take a moment to check that an issue on [GitHub](https://github.com/gogits/gogs/issues) doesn't already exist documenting your bug report or improvement proposal. If it does, it never hurts to add a quick "+1" or "I have this problem too". This will help prioritize the most common problems and requests.
 
 ## Code of conduct
 

.github/ISSUE_TEMPLATE.md

@@ -1,3 +1,5 @@
+Please take a moment to search that an issue doesn't already exist.
+
 For bug reports, please give the relevant info:
 
 - Gogs version (or commit ref):