Add blog post for EE 6.7 release

source/_posts/2014-03-26-gitlab-ee-6-7-release.markdown

+---
+layout: post
+title: GitLab Enterprise Edition 6.7 Release
+date: March 26, 2014
+author: Jacob Vosmaer
+---
+Today we announce the release of [GitLab Enterprise Edition](/gitlab-ee/) 6.7.0. 
+GitLab is an open source code hosting and project managament application.
+In addition to the [improvements in GitLab Community Edition 6.7](/2014/03/21/gitlab-6-dot-7-released/), GitLab Enterprise Edition 6.7.0 contains the following improvements.
+
+### Git hooks
+GitLab EE now lets you define project rules that can block commits from being pushed.
+In GitLab EE 6.7 we have added the following rules:
+
+- Disallow tag removal via git push (`git push origin :mytag`)
+- Validate commit messages with regular expressions
+
+[![screenshot](/images/6_7_ee/git_hooks.png)](/images/6_7_ee/git_hooks.png)
+
+### LDAP Improvements
+
+- Add support for Active Directory nested LDAP groups:
+  GitLab's LDAP group synchronization now also detects nested members of Active Directory groups.
+- Improve LDAP sign-in speed by reusing connections to the LDAP server
+
+### Bug fixes
+
+- Fix the save button in the admin group edit screen
+
+Our [subscribers](https://www.gitlab.com/subscription/) can download GitLab 6.7 Enterprise Edition from [GitLab Cloud](https://gitlab.com).