Imported some of the dynamiccore branch from love-experiments:

- Type names for love's Lua objects are specified as an argument to luax_register_type, rather than being statically defined in an array.

- luax_register_type takes a variable number of method array arguments, for registering superclass methods without copying them into the subclass' method array.

Also removed most of the header declarations for wrapper functions.

src/modules/physics/box2d/wrap_Joint.h

@@ -34,18 +34,10 @@ namespace box2d
 
 void luax_pushjoint(lua_State *L, Joint *j);
 Joint *luax_checkjoint(lua_State *L, int idx);
-int w_Joint_getType(lua_State *L);
-int w_Joint_getBodies(lua_State *L);
-int w_Joint_getAnchors(lua_State *L);
-int w_Joint_getReactionForce(lua_State *L);
-int w_Joint_getReactionTorque(lua_State *L);
-int w_Joint_getCollideConnected(lua_State *L);
-int w_Joint_setUserData(lua_State *L);
-int w_Joint_getUserData(lua_State *L);
-int w_Joint_destroy(lua_State *L);
-int w_Joint_isDestroyed(lua_State *L);
 extern "C" int luaopen_joint(lua_State *L);
 
+extern const luaL_Reg w_Joint_functions[];
+
 } // box2d
 } // physics
 } // love