Issue ldap initialization

If LDAP is disabled error will appear:

```
ERROR -- : Missing setting 'servers' in 'ldap' section in /Volumes/Work/gitlab/development/community/gitlab/config/gitlab.yml (Settingslogic::MissingSetting)
```

@marin Can you test if this will solve the startup problem?

See merge request !1179

add missing cleanup step

make sure tables are UTF8 capable

As discussed at https://github.com/gitlabhq/gitlabhq/pull/7742#issuecomment-58897445 make sure that tables have correct char set.

Feature multiple ldap servers

Update the code so Gitlab-EE can support multiple LDAP servers

See merge request !1172

Libravatar documentation

Fixes #1248

See merge request !1173

Notification level note

Fixes #1406

![Screenshot 2014-10-14 12.28.40](https://dev.gitlab.org/uploads/gitlab/gitlabhq/e2aef0a8d6/Screenshot_2014-10-14_12.28.40.png)

See merge request !1174

And add some advertisement to use GitLab EE

update changelog

Change log entry for https://github.com/gitlabhq/gitlabhq/pull/8020

Make new and edit file submit more uniform

Conflicts:
	app/controllers/omniauth_callbacks_controller.rb

Sorting users in admin

See merge request !1170

Feature oauth refactoring

same MR as gitlab/gitlab-ee!188

See merge request !1169

These changes are ported from EE to CE. Apply changes for app directory