HOST code for new grsmyr kernel

Includes some minor refactoring to consolidate production of kernel
signature by base classes.
Slightly tweaked debug console output and icon.
DEVICE kernel grsmyr-monolithic

This wasn't supposed to be released but it already has a good
performance boost solving overspilling (both I$ and regisers).
I planned to play more with uints but since MYR is getting hammered, I'm
letting it in the wild.
WEB apps supporting new kernel

Now aligned to private tree (commit 497)