Bugzilla Bug 68430

Since advancemame, advancecomp and advancemenu are already on portage, I think
an advancescan ebuild should be created. In fact, mamory, the only rom manager
for linux that worked well, seems to be abandoned, and this is the only
replacement I've seen.

From the homepage:

"AdvanceSCAN is a command line rom manager for MAME, MESS, AdvanceMAME,
AdvanceMESS and Raine.

The main features are :

    * Directly read, write zip archives without decompressing and recompressing
them for the best performance.
    * Add, copy, move and rename files in the zip archives. Any rom that you
have is placed automatically in the correct zip.
    * Recognize the text files added by rom sites and delete them.
    * Recognize the text files added by the rom dumpers and keep or delete
them.
    * It's safe. On all the zip operations any file removed or overwritten is
saved in the `rom_unknown' `sample_unknown' directories and kept for future
uses. This will prevent any unwanted remove operation.
    * Generate differential rom sets."

Forgot to close this when I added games-emulation/advancescan on 03/25.

Thanks for the bug report.