Instruct users to fetch merge request branch

Instructing users to create a new branch on the target branch and then
pulling creates a few issues. If the target branch has moved on since
the source branch diverged from it, then the pull will create an
unnecessary merge commit from the target branch to the source branch. If
the user has pull.rebase set to "true" or "preserve", then this creates
an even stranger history. These instructions will ensure the local
branch created for the merge request is exactly what contributing user
has pushed.
Attachment URL with non-/ relative root

The attachment URL was not working with relative_url_root not equal to '/'. I suggest this fix.
append .xmlschema to system hook timestamp
Handle undefined text area values

Check to see if a text area's `val` is defined before trying to call
`replace()` on it.
Change gitlab/log permissions in installation.md

This patch changes default permission of the gitlab/log directory to
u+rwX,go-w. This is done to make the directory NOT readable by group and
others and to avoid logrotate complaining about it. chmod 755 is not
used to avoid setting executable bit on file within the log dir.
Adds comments to commits in the API
Fix version of test seed branches.
Use button type=submit instead of input.
Update default regex message to match regex.
Prepare ForkService to support forking projects to given namespaces

Remove overload of BaseService.initialize, so initialize gains params,
which is used to pass the namespace (like e.g. in TransferService).

The namespace is checked for permission to create projects in it.
transfer_service_spec: cleanup, merge common code, check against nil

- replace creation of group2 with the use of group without add_owner(user)
- fold TransferService calls into new test function transfer_project
  - remove currently not used (and not working) gitlab_shell stub
    (will submit testcase simulating failure in gitlab_shell separately)
- add checks against not be_nil (result.should be_false passes even if nil)
Add issueable actor
support latest firefox esr release
Display renamed files in diff views

Show both the old and new filenames when viewing the diff for a renamed
file.
Add option to keep repo on project delete

Update the project API controller to use `Projects::DestroyService`
instead of calling `Project#destroy` directly.

Also add an optional parameter, `:keep_repo`, that allows a project to
be deleted without deleting the repository, wiki, and satellite from
disk.
Move new blob commit message textarea below editor

- match edit blob view
- you enter the commit message *after* you make the modifications
Added a password strength indicator
to the profile page and the sign_up page, added CSS to best display it and created the custom script to load the meter.
Use Gitlab.config instead of Settings everywhere
Factor abilities methods

in app controller, user model and services.
Remove unused authenticate_user from project#show

Redundant with the authorize_read_project! filter