Additional modification for successful compile on linux.

XDS build broken on linux due to errant osx specific compile flag. Is…

…sue fixed.

Added xds to the uclatools package. Also made universal builds option…

…al by using the -DUCT_UNIVERSAL:BOOL=TRUE

The UCLATools package is a collection of scripts and programs designe…

…d for

analyzing, manipulating, and converting MRI images.

This represents the first release of the repackaged UCLATools Suite.