Fix spelling of "GitLab" in HipChat service

Pedantic, but it frustrates OCD people like myself :)
Merge pull request #5520 from gabetax/rake_group_bulk_add_permissions

add rake gitlab:import: all_users_to_all_groups and user_to_groups
Merge pull request #6298 from ralish/hipchat-spelling-fix

Fix spelling of "GitLab" in HipChat service
Add information about rich text format dependencies.
Use gitlab_git 5.4.0 without BROKEN_DIFF constant

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Improve compare logic for EmailOnPush service

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix link for MR diff download

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
 Merge branch 'markup-dependencies' into 'master'

Markup Dependencies
 Merge branch 'refactor_compare' into 'master'

Refactor Compare logic

Updated gitlab_git to version 5.4.0.
Fixes MR diff download link in case of huge diff.
Fixes #1026
Gemnasium makes us red even though we are not exposed to a JRuby bug.
 Merge branch 'remove-gem-button' into 'master'

Remove Gem Button
Markdown styles dependencies are optional.
 Merge branch 'markdown-styles' into 'master'

Markdown Styles
Backticks are just confusing here.
User can leave group from group page.
Update minor version upgrade guide get latest code section.
Merge pull request #6274 from cirosantilli/leave-group-from-members-page

User can leave group from group page.
Adopt Group#members page for large groups (> 100 users)

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix group test for new member add procedure

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Show only people who have assigned issues in assignee dropdown

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>