Added extra error handling when calling out to system commands
Merge remote-tracking branch 'adrahon/master' into error_handling

Conflicts:
	lib/vagrant-kvm/action/import.rb
	lib/vagrant-kvm/errors.rb
Merge error
Separet the unit tests from the acceptance tests
Config for the video model.
Merge branch 'master' into error_handling

Conflicts:
	lib/vagrant-kvm/action/import.rb
	lib/vagrant-kvm/driver/driver.rb
	lib/vagrant-kvm/errors.rb