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.locutils.hpp

@@ -0,0 +1,42 @@
+
+bool is_explored(short i,short j);
+void make_explored(short i,short j);
+void take_explored(short i,short j);
+bool is_out();
+bool is_town();
+bool is_combat();
+bool adjacent(location p1,location p2);
+bool point_onscreen(location center,location check);
+eDirection set_direction (location old_pt, location new_pt);
+location global_to_local(location global);
+location local_to_global(location local);
+bool loc_off_world(location p1);
+bool loc_off_act_area(location p1);
+location get_cur_loc();
+bool is_lava(short x,short y);
+short sight_obscurity(short x,short y);
+short can_see_light(location p1, location p2, std::function<short(short,short)> get_obscurity);
+short combat_obscurity(short x,short y);
+ter_num_t coord_to_ter(short x,short y);
+bool is_container(location loc);
+void update_explored(location dest);
+bool is_blocked(location to_check);
+bool monst_can_be_there(location loc,short m_num);
+bool monst_adjacent(location loc,short m_num);
+bool monst_can_see(short m_num,location l);
+bool party_can_see_monst(short m_num);
+bool can_see_monst(location l,short m_num);
+bool outd_is_blocked(location to_check);
+bool is_special(location to_check);
+bool outd_is_special(location to_check);
+bool impassable(ter_num_t terrain_to_check);
+short get_blockage(ter_num_t terrain_type);
+short light_radius();
+bool pt_in_light(location from_where,location to_where) ;// Assumes, of course, in town or combat
+bool combat_pt_in_light(location to_where);
+bool party_sees_a_monst(); // Returns true is a hostile monster is in sight.
+short party_can_see(location where);
+location push_loc(location from_where,location to_where);
+bool spot_impassable(short i,short  j);
+void swap_ter(short i,short j,ter_num_t ter1,ter_num_t ter2);
+void alter_space(short i,short j,ter_num_t ter);