Added functions for mapping to and from the drawing coordinate space (i.e., the map coordinate space with both the map scaling and the OS HDPI scaling applied to it).
Added functions for mapping to and from the drawing coordinate space
(i.e., the map coordinate space with both the map scaling and the OS HDPI
scaling applied to it).

git-svn-id: 3948e88432e1a59e1cb2bc472f8f957688004121@9308 67b53d14-2c14-4ace-a08f-0dab2b34000c

ethaneldridge/vassal,ethaneldridge/vassal,ethaneldridge/vassal