added freestanding dist support for sample_data
bumped version number to 1.0.1rc
move center of map show contintents filled correctly
detect projection out of range, set error flag.
add more checks for undefined projection values.
update
add info for Hammer projection.
refer to new projection as Hammer, not Hammer-Aitoff
avoid warning messages when labelling meridians
add some more projections, label parallels and meridians.
