Add CompareAction class for collecting commits and diffs using satellites

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

Add CompareAction class for collecting commits and diffs using satellites
Update gitlab-grit to 2.6.6.
Document how to convert a backup to PostgreSQL
Add an introcudtion to mysql_to_postgresql.md
Indicate when to stop/start GitLab
Update rails to 4.0.5
Add MergeRequest#target_project_namespace

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
MergeRequest#new 2 step process

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Compare branches in MergeRequestsController#new action

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add assignee/milestone block to merge request edit page. And remove branches selector from this page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Remove unnecessary css margin

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add assignee and milestone to 2nd step

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Update sass-rails with newer version of rails.
Minor UI improvements and fixed test

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

Update gitlab grit version
Merge branch 'convert_backup_to_postgres' into 'master'

Convert MySQL backup to Postgres
Dont allow mr compare with empty branches

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch '2-step-mr' into 'master'

2 step merge request process
Fix tests

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