NINTV-DS Release Version 4.4

Nintellivision - an Intellivision Emulator for the DS/DSi. High compatibility, custom overlay support, high score saving, tons of input mapping - all the quality of life improvements you need!

V4.4 : 30-Oct-2023 by wavemotion-dave

Major overhaul of configuration to provide for better future enhancements. Your old configurations will be wiped in favor of the new defaults.
Major cleanup of overlay support - gone are the built-in overlays except for the normal Intellivision controller graphic and the mini-ECS keyboard. All other overlays are stored externally and a library of more than 40 custom overlays for personal use are provided.
Simplified use of custom overlays - if the .ovl file exists (with the same base name as the .ROM or .BIN file), it will automatically be loaded and used (you no longer need to specify that the overlay is 'Custom').
Other minor cleanups and tweaks as time permitted.