Adding links to contributing features and code

README.md

@@ -52,8 +52,10 @@ with GitLab Single-Sign-On.
 - [GitLab Mattermost SSO Documentation](http://docs.mattermost.com/deployment/sso-gitlab.html)
 - [GitLab Mattermost Troubleshooting Forum](http://forum.mattermost.org/c/general/gitlab)
-### Sharing feedback: 
+### Get Involved:
 - [Report issues and get help from GitLab Mattermost Troubleshooting Forum](http://forum.mattermost.org/c/general/gitlab)
 - [Please report security issues via Mattermost Responsible Disclosure Policy](http://www.mattermost.org/responsible-disclosure-policy/)
 - [Issues not related to GitLab Mattermost or GitLab omnibus](https://about.gitlab.com/getting-help/).
+- [Contribute, upvote and discuss new feature ideas](http://www.mattermost.org/feature-ideas/).
+- [Read contribution guide and find opportunities to contribute code changes](http://docs.mattermost.com/developer/contribution-guide.html).