Added user resource attr to mac_os_x_userdefaults LWRP.
Adds ability to set user for shell_out opts.
Adds mac_os_x cookbook dep back to metadata.
Merge branch 'master' into resource-attr-user

Conflicts:
	providers/userdefaults.rb
Merge pull request #10 from patcon/resource-attr-user

Add `user` resource attr to `mac_os_x_userdefaults`