Fixed music tempo and continuity in Item M90 and M92 drivers [.Added clone of Vigilante to the Vigilante driver.Added clone of Aquajack to the Taito-Z driver.Updated the dat file creation module to remove the md_ from the Megadrive shortnames.Removed menu option for making a datfile with both arcade games and Megadrive games, the two would conflict, and arcade and Megadrive dats need to be handled seperately.Added better SRAM support and support for custom mappers as per MESSIncreased the maximum number for sek handlers to 10.Made the short name in the game selection dialog slightly longer to accomodate the Megadrive short names.Made the seventh rom path special like the eighth one so that Megadrive roms can be stored in one of the last two paths and still allow supplementary FB Alpha roms to be in a seperate path.Updated Megadrive driver based on MESS 0.143u7 software list.
