#164 Auto-save films

[Jon Irons]

Create an option the user can toggle somewhere in Preferences that automatically saves the temporary films that would be played with "Replay Last Film." Zlib compression a bonus. Although Aleph One now allows files to be sorted by date in its selectors, it would be nice to have a name structure including the time and date. For example, Mapname-yyyy-mm-dd-hh-mm-ss. While this looks ugly, I'm sure it could be filtered in the selector. Other fields such as game type might be nice as well.