Add gitlab shell version file.
Add python-docutils to dependency list.
Merge branch 'update_installation_doc_python_docutils' into 'master'

Update installation doc with python-docutils

Fixes #1293
Update check task and add to monthly release doc lines about gitlab_shell_version file.
Make a system comment when issue milestone changed

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

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Make a comment to MR whne milestone was changed

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

Gitlab shell version file
Test for milestone changed comment

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

Create a note when issue milestone was changed

Part of #1207
Merge branch 'master' of github.com:gitlabhq/gitlabhq