Very, Very simple auto-save

The auto-save added cannot load at the moment, as it's line of code is
edited out in the continue button object.

The auto-save works by dragging and dropping the obj_save into whatever
room you want to auto save on open. The code only works for when a room
is just opened with the obj_save inside of it.

This is most likely not the finished code for saving, but it's something
that seems to work rather well. It also does not utilize the GM's own
save and load functions.