Also takes all the duplicated parts of random maps including the new
player start entities and random biome system into rmgen libraries.
Tweaks nile river and snowflake random maps.
This was SVN commit r11152.
Includes default library "rmgen" w/ API based on rmgen tool.
Modifies rmgen scripts Cantabrian Highlands, Neareastern Badlands, and
Latium.
Old map support dropped from MapReader.
Fixes a few bugs in existing game setup and initialization scripts.
This was SVN commit r9096.