Revision history for PDL::Graphics::Map:

0.01  07/27/2000
	- original version

0.06  5/24/2005
        - silly little fix to handle new bad value behavior in PDL 2.4.2

0.07  8/01/2005
        - Added  #include "XSUB.h" to pscoast.c.  Apparently newer perls (5.8.7)
          need this to find 'my_perl' symbol.
0.09  7/24/2008
        - Fix river plotting
0.10  10/15/2008
        - Add better prerequisite handling if PDL is not installed