Add specs for GitRefValidator

Add system hook for ssh key changes

Fix branch remove for branches containing a '/'

Add users with deterministic username and password to development seed.

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

Conflicts:
	spec/lib/gitlab/oauth/user_spec.rb

Add system hook for ssh key create and destroy
Update and fix documentation
Update tests

Mention [skip ci] in CONTRIBUTING.md.

http://docs.travis-ci.com/user/how-to-skip-a-build/

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

Rename Activity to Project tab

Fixes #1544

See merge request !1058

Modify GitLab to work with gitlab-shell 2.0

Related to #1516

See merge request !1057

'all' is not a valid username

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

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

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

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

gitlab->GitLab

remove unnecessary chmod

[Documentation] simplify 6.0 to 7.2 upgrade guide

`lib/support/init.d/gitlab` was set as executable in the repo as of the
6.1 release so chmod is not needed after that. See
https://github.com/gitlabhq/gitlabhq/pull/7586/files#r16885445.

API: Filter issues by state

While working on [laboard](https://gitlab.com/jubianchi/laboard) I had some issues with the API : I was not able to filter issues by state so I had to write some logic to do it on my side.

I think it will be useful to have this feature supported by the Gitlab API, moreover, the MR API already provides such filter capabilities.

I added the filtering logic on `/issues` and `/projects/:id/issues`.

The commits are not squashed but I'll do it once everything seems ok to you.

See merge request !168

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

Ensure Oath supports providers without email response

See merge request !1054

As found in the omniauth specs: https://github.com/intridea/omniauth/wiki/Auth-Hash-Schema

Comment and close

Fixes #1240

See merge request !1055

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

This fixes #1541