New firmware for the Swissmicros DM15L

[jebedeo]

Hi All,

Thanks for all the bug hunting!

1. I fixed, again, the -> H and -> HMS, knock on wood.
2. Fixed the wrong stacklift behavior with digit entry, backspace, and rolldown.
3. Fixed the GTO pointing to the wrong line number
4. STO/RCL, FIX/SCI/ENG, flag check/set/clear, and GOT/GSB now supports index register I and (i)

Working on ISG/DSE next...