Fix bug in packages stanza (fixes #126)
Created 3 new tasks:
  AddManifestSources
	AddRemoteManifestPackages
	AddLocalManifestPackages
They are added independently depending on what is specified in the manifest.
Remove hardcoded .vdi in QEMUVolume exceptions
Collect all missing host pkgs before erroring out
Verify lines in packages.sources
Remove comment from loopbackvolume
Fix bug where local package installation failed
Simplify ONE Context installation
Fix bug in vagrant plugin
prebootstrapped: don't reinstall GuestAdditions
New plugin: puppet
Install your own puppet configuration and run a manifest
Vagrant plugin creates its own user etc. now
There is no need to rely on other plugins any longer
Merge remote and local package array in manifest
This allows us to specify the order of installation for packages
Fixes #127
image_commands now uses manifest_vars
Allow for building unstable release images.
Fix unstable package repository and network configuration.