Introduce develop_git for conversion from develop.svn to develop.git

This is a possible location for the script to open the pull request. We'll see how things make sense as this gets built out.
Implement develop_git and update provision script to git pull after the fact

Fixes Varying-Vagrant-Vagrants/VVV#154
Merge pull request #294 from x-team/154-develop-git

Implement develop_git and update provision script to git pull after the fact
Merge pull request #154 from Varying-Vagrant-Vagrants/154-develop-git

Connect develop.svn with (upcoming) develop.git