Added examples for use with Leonardo

Leonardo versions of echo, locus_dumpbasic, locus_erase, locus_start,
locus_status, and parsing sketches
Made lat/long int32_t instead of floats for performance and precision
Merge remote-tracking branch 'koehn/master' into jyd-1

Conflicts:
	Adafruit_GPS.cpp
	Adafruit_GPS.h