Initial commit
Vagrant cofing added
Provide different virtual machine configurations

The following change collects VM configuration from files:
* ./puphpet/config.yaml (Global)
* ./.puphpet/config.yaml (Project)
* ./.puphpet/.config.yaml (Local)

The files in the bottom of the above list will override
any configuration options inherited from the top of the list.
Use developer_environment_training puphpet

Switch from `developer_environment` puphpet to
`developer_environment_training`. The puphpet
from `developer_environment` was not reliable
enough to continue with the training.
RTFM

This will be rebased soon, so who cares?