Further refactoring of Mame Perl script

Logic was out of sequence making flow hard to follow
Mame Perl script now ingores language of roms which have lanaguage already set

This is so languages.ini lookup in quickplay can be run by the user at the same time as catver and nplayers scans and won't be overridden with a potentially less-precise method
Defaults.rc relativised, and Emulators.ini use added in it

Checked relativising paths in defaults.res and same output was made - this should be default
Emulators.ini now instantiates on first run with Start and Explorer emulators...

for PC Games (using ReactOS). Logic for instantiation same as for Tools.ini. Reminder that to compile defaults.RES we alter defaults.rc and/or resource files and run brcc32 defaults.rc
consistent case for Emulators and Tools inis