Images/[Compressed]ImageData can be created using any Data, instead of just files or FileData.

--HG--
branch : minor

src/modules/filesystem/wrap_Filesystem.h

@@ -42,6 +42,9 @@ FileData *luax_getfiledata(lua_State *L, int idx);
 bool luax_cangetfiledata(lua_State *L, int idx);
 File *luax_getfile(lua_State *L, int idx);
 
+Data *luax_getdata(lua_State *L, int idx);
+bool luax_cangetdata(lua_State *L, int idx);
+
 bool hack_setupWriteDirectory();
 int loader(lua_State *L);
 int extloader(lua_State *L);