Removed vestigial #include GPSconfig.h
Removed vestigial #include GPSconfig.h

#include "GPSconfig.h" is leftover from some earlier version. Since the
fie is no longer in the library, it causes a compilation error

huskyroboticsteam/2014-15,lolisa/2014-15,lolisa/2014-15,tonesandtones/Adafruit-GPS-Library,ulrichard/Adafruit-GPS-Library,adafruit/Adafruit-GPS-Library,huskyroboticsteam/2014-15,kaaLabs15/Adafruit-GPS-Library,huskyroboticsteam/2014-15,1ChicagoDave/Adafruit-GPS-Library,lolisa/2014-15