cleaned up some unnecessary code from GridMap
Merge branch 'master' of https://trac.orr.noaa.gov/git/GNOME2
moved some stuff from Typedefs back to gui gnome
added a utility for checking memory usage -- probably only works on *nix...
added draw_ontop keyword to Renderer so user decides whether to draw
'uncertain' of 'forecast' LEs on top. Default is 'forecast' on top