Initial import of OnEarth code.
Adding missing code updates to mrf_insert and mrf util.
GIBS-353 Fixed tolerance resolution check in mrf_insert.
#5 GIBS-353 Added some tolerance to north and west boundary detection so
patch is not outside of target with rounding.
GIBS-357 Added initial draft MRF specification.
GIBS-357 Fixed image links on spec.
Merge remote-tracking branch 'gdal_mrf/split'

Conflicts:
	GNUmakefile
	makefile.vc