Old mapversion will be obsolete

[SnotlinG]

When we launch next version (version 0.92), this version of the mapeditor won´t support the oldest mapeditor format anymore. This means that if you still have any old map (listed as "Old beta5 version" in the description) that you want to keep, you must now load it and re-save it again. Make sure it then is showed in your maplist properly, without the "Old beta5 version".