Release/7.0

Nginx asset path

Fix git double installation

This MR removes `git` from the list of packages installed by `gitlab` since `git` is installed from source via `include_recipe "gitlab::git"`.

Added specs for this change.

Feature custom nginx install

This new attribute (`node['gitlab']['install_nginx']`) will prevent nginx installation. Only the installation part is affected by this change, not gitlab nginx configuration.

This enable us to install our custom, source version of nginx.

Fix missing unzip git install rhel

This is a re-submit of [MR !61](https://gitlab.com/gitlab-org/cookbook-gitlab/merge_requests/61) without problems mentioned there and with proper spec added proving the fix works.

Add option for Vagrant development

Vagrant development was deprecated in favor of a metal installation per issue #51. This raises the barrier to entry for potential contributors. Issue #54 was opened to bring Vagrant back as one development option.

This MR adds a Vagrantfile that creates a box suitable for local development. All processes are run by the "vagrant" user, hopefully sidestepping any problems the arise from using two different accounts.

The configuration is largely the same as the Vagrantfile originally included with the cookbook, but it removes the "git" user, performs checks for required plugins, adds an option to disable port forwarding, and fixes some ruby permission warnings with synced directories. It also adds a simple `gitlab` command alias to start the service.

This has been tested on Mac OS X v10.9.

 * Git is already installed from source, no need to install the package
   for it also. Moreover, it is not present in the other list of packages
   for platform other than rhel.
 * Added spec to prove it.

Rewrite git

Conflicts:
	doc/development.md

Dev fixes

Make the development install of the cookbook easier.

Release 6.9

Nicer intro

Change development setup

#51

Redis Monit syntax error

Metal dev hints

Development setup documents, vagrant deprecations