Update README.md

README.md

-GitLab Mattermost Support Forum
--------------------------------
+## GitLab Mattermost
 GitLab Mattermost is a team communication service for sharing messages and
-files across PCs and phones, with archiving and instant search.
-Overview here: https://gitlab.com/gitlab-org/omnibus-gitlab/tree/master/doc/gitlab-mattermost
-This project was created so GitLab community members could **[file and 
-discuss issues regarding GitLab Mattermost via GitLab.com]( 
-https://gitlab.com/gitlab-org/gitlab-mattermost/issues)**.
-- Issues are monitored by the [Mattermost team](http://www.mattermost.org/). 
-- For Mattermost security issues please see our 
-[Responsible Disclosure Policy](http://www.mattermost.org/responsible-disclosure-policy/)
-- For GitLab issues other than GitLab Mattermost please see the [Getting Help for GitLab](https://about.gitlab.com/getting-help/).
-Thank you kindly for trying out GitLab Mattermost. 
-We look forward to your feedback, questions and ideas.
+files across PCs and phones, with archiving, instant search and integration 
+with GitLab Single-Sign-On. 
+*Screenshot: GitLab Mattermost team creation screen with SSO pre-configured from omnibus*
+![alt text](http://www.mattermost.org/wp-content/uploads/2015/09/ScreenClip-661.png)
+### GitLab Mattermost features include: 
+#### Messaging and File Sharing 
+
+- Send messages, comments, files and images across public, private and 1-1 channels
+- Personalize notifications for unreads and mentions by channel and keyword
+- Use #hashtags to tag and find messages, discussions and files  
+
+*Screenshot: GitLab Mattermost on Desktop*
+
+![alt text](http://www.mattermost.org/wp-content/uploads/2015/06/20150715_mm_desktop2.jpg)
+
+#### Archiving and Search
+
+- Import Slack user accounts and channel archives
+- Search public and private channels for historical messages and comments
+- View recent mentions of your name, username, nickname, and custom search terms
+
+#### Anywhere Access
+
+- Use Mattermost from web-enabled PCs and phones
+- Attach sound, video and image files from mobile devices
+- Define team-specific branding and color themes across your devices
+
+*Screenshot: GitLab Mattermost on Mobile Web*
+
+![alt text](http://www.mattermost.org/wp-content/uploads/2015/06/mm_demo.gif)
+
+#### Enterprise Compatibility 
+
+- Self-host Mattermost entirely within your organization's insfrastructure
+- GitLab Mattermost omnibus supports install to over 100,000 organizations using GitLab
+- LDAP/Active Directory connectivity to Mattermost enabled via GitLab Single-Sign-On
+
+### How to Install GitLab Mattermost
+
+- [GitLab Mattermost Install Guide for omnibus](https://gitlab.com/gitlab-org/omnibus-gitlab/tree/master/doc/gitlab-mattermost)
+- [GitLab Mattermost SSO Documentation](https://github.com/mattermost/platform/blob/master/doc/integrations/sso/gitlab-sso.md)
+- [GitLab Mattermost Troubleshooting Forum](http://forum.mattermost.org/c/general/gitlab)
+
+### Sharing feedback and filing issues: 
+
+- [Please report security issues via Mattermost Responsible Disclosure Policy](http://www.mattermost.org/responsible-disclosure-policy/)
+- [Please file GitLab Mattermost-specific issues to the GitLab Mattermost issue tracker]( 
+https://gitlab.com/gitlab-org/gitlab-mattermost/issues).
+- [GitLab issues not related to GitLab Mattermost or GitLab omnibus](https://about.gitlab.com/getting-help/).
+
+*Screenshot: Preview of Slack Import feature available in GitLab 8.0 release* 
+
+![alt text](http://www.mattermost.org/wp-content/uploads/2015/09/slack_import.png)
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