v0.4.2

delugemu v0.4.2

Display: the front-panel window now fits your monitor. Previously the host
window opened at the native panel size (2256x1584) and overflowed smaller
screens, with zoom-to-fit only scaling on later resize. The skin device now
renders the composited panel down-sampled (box-filtered from native) and opens
the console at a screen-fitting size; run.sh detects the primary monitor and
picks the largest scale that fits ~90% of it. New --skin-scale <percent|auto|
native> overrides it; zoom-to-fit still tracks resizes.

Also: add run.sh --icount opt-in (deterministic, artifact-free audio capped to
real time), keep the firmware render-head clamp as the graceful-degradation
default (--tx-render-head), and force zoom-to-fit on the console window.