JPSSnagg

test/testnagg.sh:          added explanation of available test script functions.
                           began adding test ids to tests for matching with requirements document
test/nagg_functions.sh     added parameter to h5dump_grep option for future use of grep options
src/nagg_write_granules.c  added H5Rdefeference_ macro coutesy of Scot Breitenfeld to call the
                           correct H5Rdereference version for HDF5 1.8 or HDF5 1.9(1.10).
src/nagg_options.c         added long option entry for "--geolocation" to address JPSS-161
other                      fixed several typos in comments.

Tested on platypus with gcc and icc compilers