Add Solaris 11 IPS pkg module

Hi,
Solaris 11 comes with new pkg system (IPS). The old pkg system is still functional, so I've added this module to the list of alternate providers. Maybe in the future it can be the default provider for Solaris 11.
I've never contributed a full module so please check if I made all neccessary steps.
If you want, i can also write a few words about how to package salt minion using IPS. Or eventually use automated zone installer to include salt-minion pkg in the install and run it after first boot.
Jan