Makefile.end: avoid cosnet in installed Makefile
vagrant support for composite virtualbox VM

Add support for using vagrant (www.vagrantup.com) to bootstrap
a working composite development environment. Include documentation
and a line in gitignore to ignore configuration files vagrant creates
when it executes.
Vagrant.md: direct users to install virtualbox
vagrant: use explicit ssh host and port
doc: update vagrant documentation
vagrant: go back to using DHCP
Merge pull request #92 from gedare/vagrant

Vagrant