323 new/updated SNDH files (1209 subtunes).

We slug out another SNDH update.

Quick highlights :-

+ All the sid-i-fied tunes from HIPSid incuded
+ More SNDH-Digi tunes including Altair, Populous & Fighter Bomber
+ Tonnes of rare tunes by Mephistow & Jovis
+ More ancient un-ripped tunes by Daglish, Loriuax, Shimskey & Legace
+ Curse of Ra, innovative chip-digi driver for the time