Add name attribute to metadata

It is highly recommended and makes it possible to use with Berkshelf.
Remove dependency on apt cookbook

There is nothing from the apt cookbook that we use.
Even thought it is a good idea for users of Debian based systems to
include it on the run list, this cookbooks works fine without it.

Anyway replace the shell provisioner with the apt cookbook in the
Vagrant setup for updating the apt cache.
Add and document support for Debian
Add AutocleanInterval configuration

Specifies how ofter the local download cache is cleaned up.
Added Package-Blacklist support
Added Package-Blacklist attribute
Added Package-Blacklist attribute description
new Vagrantfile
new .gitignore
berks init
new version
remove apt cookbook dependency
nueva version
Merge remote-tracking branch 'tmatilai/auto-clean'
Merge remote-tracking branch 'tmatilai/debian-support'

Conflicts:
	README.md
	Vagrantfile
	metadata.rb
	recipes/default.rb