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/system/wrap_System.h

@@ -30,13 +30,6 @@ namespace love
 namespace system
 {
 
-int w_getOS(lua_State *L);
-int w_getProcessorCount(lua_State *L);
-int w_setClipboardText(lua_State *L);
-int w_getClipboardText(lua_State *L);
-int w_getPowerInfo(lua_State *L);
-int w_openURL(lua_State *L);
-int w_vibrate(lua_State *L);
 extern "C" LOVE_EXPORT int luaopen_love_system(lua_State *L);
 
 } // system