Merge branch 'k-gh-ee' into 'master'

added info about GitHub EE

Added important info about importing from GitHub EE

https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/1878#note_49973
https://dev.gitlab.org/gitlab/gitlabhq/issues/2410#note_49396

See merge request !431

doc/workflow/importing/import_projects_from_github.md

 # Import your project from GitHub to GitLab
 
-It takes just a couple of steps to import your existing GitHub projects to GitLab. Keep in mind that it is possible only if
-GitHub support is enabled on your GitLab instance. You can read more about GitHub support [here](http://doc.gitlab.com/ce/integration/github.html)
+You can import your existing GitHub Enterprise projects following these steps.
+
+* First, you need to [enable GitHub Enterprise support](http://doc.gitlab.com/ee/integration/github.html) on your GitLab instance.
 
 * Sign in to GitLab.com and go to your dashboard.
+
 * To get to the importer page, you need to go to the "New project" page.
 
 ![New project page](github_importer/new_project_page.png)
@@ -15,4 +17,4 @@ GitHub support is enabled on your GitLab instance. You can read more about GitHu
 * To import a project, you can simple click "Add". The importer will import your repository and issues. Once the importer is done, a new GitLab project will be created with your imported data.
 
 ### Note
-When you import your projects from GitHub, it is not possible to keep your labels and milestones and issue numbers won't match. We are working on improving this in the near future.
\ No newline at end of file
+When you import your projects from GitHub, it is not possible to keep your labels and milestones and issue numbers won't match. We are working on improving this in the near future.