- added a system to display one or two strings and/or call a special the first time the party sees a particular type of monster

- added ambient sound, both outdoor ambient sound and monster vocalizing ambient sound (eg cat meowing when in sight)
- fixed an inconsistency whereby two sounds were swapped relative to their original Mac versions
- added (but haven't yet used much) a few more typedefs for clarity

git-svn-id: http://openexile.googlecode.com/svn/trunk@86 4ebdad44-0ea0-11de-aab3-ff745001d230

osx/boe.graphutil.h

@@ -25,3 +25,4 @@ bool is_ground(ter_num_t ter_type);
 char get_fluid_trim(location where,ter_num_t ter_type);
 void check_if_monst_seen(unsigned short m_num);
 void adjust_monst_menu();
+void play_ambient_sound();