Detect byte expanded files for non-genesis formats on genesis everdrive flash cart

[euan-forrester]

It seems that some knockoff everdrives can produce byte-expanded files for game types such as SMS. An example is attached.

We should try to detect these files and silently un-expand them when converting to raw format.

For going to the everdrive I don't want to give the user an option to byte expand them because that will clutter the interface. This doesn't seem to be a very prevalent issue, and it seems even more unlikely that someone would be migrating their saves to a knockoff everdrive than migrating them from a knockoff everdrive.

If that issue does come up, those users can be referred to the Advanced tab to byte-expand their files, or maybe a workaround using a genesis conversion elsewhere on the site if the Advanced tab doesn't exist yet.

Phantasy_Star_USA_Europe_Rev_A.srm.zip