savefile: use little-endian format for fields where that makes a difference
replace build-time level compiler and dungeon compiler with run-time loading of
the dungeon and level descriptions and interpreting them via LUA
+split off some of the functionality that was in makedefs (compiled-in options
+ build date/time, etc) so that it can be built by a cross-compiler
+ and accessed on the target platform
Platform- and/or Interface-Specific New Features