[PATCH] Moving HitDetails construction to a constructor =)

[Nicolás Lichtmaier <ni...@reloco.com.ar>]

I propose this patch. It moves the logic of contructing a HitDetails 
from a Lucene document to the HitDetails constructor. It also removes 
useless array copies. The benefit of this patch is to be able to use 
part of Nutch machinery (get a Lucene document by other means and later 
construct a HitDetails). It also looks cleaner IMO.

Thanks!