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- this means that 320x240 is now the default 'base' size, and zoom levels are based on that
- the TIA image is rendered into whatever sized window is active, meaning that NTSC and PAL modes now look similar

Removed some 'small screen' dead code in FrameBuffer.

- Some of these are quite unncessary, but the compiler won't shut up otherwise.

updated doc for enhanced command dialog and controller auto detection

- p0 diff (and p1 too) now use a single event to switch, instead of two separate events
- same as above to color/bw
- this requires changes to the base R77 firmware, which is in a separate commit.

- this is available for all ports, but is most beneficial for R77, which has only joystick input

Basically, separate high-level read/write from low-level set/getPin methods.

added to OptionsDialog for testing

- This still needs some testing and doc updates, but it seems to be
working great
- Hopefully people will now stop asking for this feature