* Refactor Language Card:
. MemSetPaging() now not used for $C080-C08F accesses.
- Instead LC registers its own I/O handler like all other slot 1-7 cards.
. Saturn uses base LC's 16K for bank0
* Move all 'modechanging = 0' to UpdatePaging()
Added support for #590:
* Changed Apple II original to default to no LC
* Added new cmd-line switch: -s0 <languagecard|lc>
* Changed so when LC is in slot-0, it now use Apple II+'s F8 (auto-start) ROM
Support for #408:
* added slot-0 LC and Saturn 128K for Apple II and II+
* added save-state support
- for slot-0 LC/Saturn, save the LC state in the slot-0 card, not the //e MMU; and switch to a new Apple2 unit ver2
* added g_Slot0, g_SlotAux
* added new LanguageCard.cpp/h to project and moved Saturn code into these new files.
* updated VS2013,2015,2017 projects
