Reuse folder synchronization code from Vagrant core
 raise minimal Vagrant version to 1.5
Merge branch 'sync-folders' of github.com:mkuzmin/vagrant-vsphere into mkuzmin-sync-folders

Conflicts:
	lib/vSphere/action/sync_folders.rb
	locales/en.yml
Updates version and README for new changes.
Takes a stab in the dark at fixing the spec for :data_dir problem.
ignore
Merge branch 'mkuzmin-sync-folders'