Add display_name to Biome, Item_type, Monster_type, Monster_genus, Terrain, and World_terrain.  In case the name that should be displayed to the player is different from the unique data name.
Add display_names to stairs and doors; "You open the closed door" is now "You open the door" and "You go up the stairs up" is not "You go up the stairs."  Also fix a bug that was preventing closing doors.
Merge pull request #8 from trevmillion/master

Merged!  This looks awesome, thank you.
I should add notes to terrain.dat to specify standard terrain glyphs (letters should be reserved for monsters), but for now this is good, thanks!
Fix some issues with new Franklin house.  Make glyph warn when loading non-existant colors.  Map "grey" and "gray" to "ltgray" in color_string()
Fix wall variance in house.map
Merge remote-tracking branch 'upstream/master'