remove useless information from CONTRIBUTING file and make it more cloud neutral

.github/CONTRIBUTING.md

@@ -1,7 +1,5 @@
 ## Submitting issues
 
-If you have questions about how to install or use ownCloud, please direct these to the [mailing list][mailinglist] or our [forum][forum]. We are also available on [IRC][irc].
-
 ### Short version
 
  * The [**issue template can be found here**][template] but be aware of the different repositories! See list below. Please always use the issue template when reporting issues.
@@ -12,34 +10,16 @@ If you have questions about how to install or use ownCloud, please direct these
   - You can also filter by appending e. g. "state:open" to the search string.
   - More info on [search syntax within github](https://help.github.com/articles/searching-issues)
 * Report the issue using our [template][template], it includes all the informations we need to track down the issue.
-* This repository is *only* for issues within the ownCloud mail code. Issues in other compontents should be reported in their own repositores: 
-  - [ownCloud core](https://github.com/owncloud/core)
-  - [Activity](https://github.com/owncloud/activity/issues)
-  - [Bookmarks](https://github.com/owncloud/bookmarks/issues)
-  - [Calendar](https://github.com/owncloud/calendar/issues)
-  - [Contacts](https://github.com/owncloud/contacts/issues)
-  - [Documents](https://github.com/owncloud/documents/issues)
-  - [Gallery](https://github.com/owncloud/gallery/issues)
-  - [Music](https://github.com/owncloud/music/issues)
-  - [News](https://github.com/owncloud/news/issues)
-  - [Notes](https://github.com/owncloud/notes/issues)
-  - [Tasks](https://github.com/owncloud/tasks/issues)
-  - [All other apps](https://github.com/owncloud/apps/issues)
 
 If your issue appears to be a bug, and hasn't been reported, open a new issue.
 
 Help us to maximize the effort we can spend fixing issues and adding new features, by not reporting duplicate issues.
 
-[template]: https://raw.github.com/owncloud/mail/master/issue_template.md
-[mailinglist]: https://mail.kde.org/mailman/listinfo/owncloud
-[forum]: http://forum.owncloud.org/
-[irc]: https://webchat.freenode.net/?channels=owncloud-mail
+[template]: https://raw.github.com/owncloud/mail/master/.github/issue_template.md
 
 ## Contributing to Source Code
 
-Thanks for wanting to contribute source code to ownCloud Mail. That's great!
-
-[devmanual]: http://owncloud.org/dev/
+Thanks for wanting to contribute source code to the Mail app. That's great!
 
 ## Translations
 Please submit translations via [Transifex][transifex].