Simply build system to copy NW files into Nutch dirs and use Nutch build.xml

Perhaps it's time to re-evaluate the approach taken in NutchWAX to intertwine it's build system with that of Nutch.

It might be easier just to copy all the NutchWAX files into the corresponding Nutch directories and then let Nutch's build.xml do all the work.

This is related to WAX-71, where NutchWAX libraries are not put into the .job file.