Refactor as deployv addon

Now gitlab_tools is installable as a deployv addon.

To test:

1. git clone git@git.vauxoo.com:vauxoo-dev/gitlab_tools.git -b master-addon-tomeyro
2. Install with

• cd gitlab_tools && sudo python setup.py install or
• pip install gitlab_tools

3. Run deployvcmd

You should see that now gitlab_tools appears between the available options:

If you run: deployvcmd gitlab_tools --help (1) it will display all available subcommands for the addon (2) and also notice that in the installation process it creates some configuration files and deployv automatically loads them:

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Closes #1 (closed)