Handle undefined text area values

Check to see if a text area's `val` is defined before trying to call
`replace()` on it.
Fix milestone link in issue. Closes #174 (gitlab.com).
Use button type=submit instead of input.
Fix identation.
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)
Dry admin logs.
fonts: Added "DejaVu Sans Mono" and "Ubuntu Mono"

Everything is better than "Courier New" ...
support latest firefox esr release
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.
Remove unneeded app/finders config.autoload path

Every directory under app/ is searched by default
Document Markdown table formatting issue

Add a note to the Markdown documentation about a quirk of Redcarpet's
table parsing.
fix exclude wiki regex

the new regex allows importing repositories with repository name ending with wiki but still exclude gitlab wiki repositories
Use :message key, not :error for File::Service.
Remove unused dev_tools helper.
Remove unused filter from ProjectsController

Neither controller nor any of it's descendants have those actions.
Factor authorize_push! and authorize_code_access!

with existing method_missing. Pattern already used extensively,
so let's be consistent and use it everywhere.
Add Hipchat services API
fix permission issue in upgrade guides
add gitlab-shell identification
Point to correct project on githost.io.