[Wien] Berry phase now for spin-polarized calculations

[Oleg Rubel]

Dear Wien2k Users,

All the best to everybody in the New 2014!

For those who are interested in calculation of polarization and
related properties, the new version of BerryPI v1.1 is out
(https://github.com/spichardo/BerryPI/releases)

The new features include:
- spin polarization
- spin-orbit coupling
- orbital potential

Your feedback/comments/suggestions are highly appreciated and will be heard :)

Best regards
Oleg