merge in working sdcard controller (for reading at least).
Issue #24
merge in improved uart monitor with memory page dump command.
merge some of the changes to get sdcard working.  Does not
yet compile.  Issue #24
add waitstate to F011 / sd card controller fastio access. Issue #24
add missing ROM template.
add missing rom template file.
add missing sensitivities to rom_template.vhdl
add missing sensitivities.
Make VIC-IV keep $D080-$D09F unmapped for FDC.