- added Debian Wheezy specific installation scripts
- now configures using the eth1 ip address (instead of eth0), this makes
  it easier to install when using a Vagrant vm
- moved hosts to hosts.sample, updated README.md to specify customizing
  this file
- moved group_vars/all to group_vars/all.sample, updated README.md to
  specify customizing this file
- added boostrap.sh and site.sh safety checks to make sure the sample files were created
- added other safety checks in case things are run twice