synchronise admins from LDAP group

from http://feedback.gitlab.com/forums/176466-general/suggestions/5738973-make-all-members-of-ldap-group-gitlab-admins :
> Make all members of LDAP group GitLab admins
>
> In GitLab EE it would be nice if you could make everyone in a certain LDAP group GitLab administrators.
>
> For instance, you would have a LDAP group 'GitLab admins' and anyone added to that group would automatically become admin in GitLab.

Ee has different source and docs

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

Omnibus has improved

Add other to sharing to make this clear

See my comments in https://dev.gitlab.org/gitlab/gitlab-ee/merge_requests/118

Doc/share project with groups

CE changes into EE

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

Conflicts:
	VERSION
	app/views/layouts/devise.html.haml
	features/project/project.feature
	features/steps/project/project.rb

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

Small changes

Rename home tabs

* Dashboard Home -> Activity
* Project Home -> Activity
* Group Home -> Activity
* Profile Home -> Profile
* Admin Home -> Dashboard

Related to #1351

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

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

Commit log 25

Related to #1381

Improve markdwon parsing

Fix 500 error when try to use relative links in project issues if repository is empty

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

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

Dash between description and readme link

Remove unused group filter

* dont try to build links for anchors like `#title-anchor`
* dont build relative url for project with empty repo
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

do not advertise gravatar in profile if disabled

Document the basics of working with Groups

Fix the PullReview tool link

Small contributions no rebase

Based on https://github.com/gitlabhq/gitlabhq/pull/7067#issuecomment-45060241

/cc @dzaporozhets