Rename ROMs according to datfiles

[Miss-Inputs]

Likewise with the other ROM management ideas, this would be accessible from a menu and operate on several ROMs at once and be accessible from the command line, etc.

Anyway, this should take the datfile match if any, and rename the ROM to what it says, except with these options:

• Don't change "The" to ", The"; I'll have to change it back
• Don't rename anything starting with [BIOS] to the wrong extension, just leave that extension alone
• Remove cruft like (SGB Enhanced) or (GB Compatible)
  It's already known how I feel about those, but maybe some people like them (I'm sure the No-Intro people do). Hence option.

Naturally avoid overwriting any existing file with the new name, but maybe it could be useful to at least inform the user after a batch rename if that ended up happening.