Add 'nameref' command to hyperref package

Hi Daniel,

I'd like to add a nameref command to the hyperref package. According to http://en.wikibooks.org/wiki/LaTeX/Labels_and_Cross-referencing this command is in the nameref package, but it's automatically included when you use hyperref.

I've tested this command in my LaTeX gen code - seems to be working fine.

Best regards,
-Dmitry