add support for "ume*.exe".
remove device-drivers "emu/*/*.c" from "Drivers" filter.
change version to 1.5.8.1.
change cache-file flag.

git-svn-id: https://mameplus.svn.sourceforge.net/svnroot/mameplus/trunk/mamepgui@5110 e0215e0a-1e64-f442-9f1d-d2f61a7f4648