Major code reorganization

This commit only updates the XCode project for the changes.
A later commit each will update it for scons and MSVC.

A few actual changes are mixed in:
- Add a prefix header for a handful of common definitions
- Moved current_cursor into the Cursor class as a static member
- Removed the make_cursor_sword and make_cursor_watch functions
- Include tests in the All target
- Remove redundant -l flags for Common and Common-Party (since they're included in the Link phases anyway)

src/game/boe.townspec.hpp

@@ -0,0 +1,9 @@
+
+#include <string>
+
+void activate_monster_enc(short enc_num,std::string list,short str,short strsnd,short *flip_bit);
+bool special_trap(short trap_type,short dialog_num,short *flip_bit);
+bool run_trap(short pc_num,eTrapType trap_type,short trap_level,short diff);
+
+location get_spec_loc(short which);
+bool handle_lever(location w);