gitignore: Ignore MacOS .dylib dynamic libs.
scp: Only install scp_dump binary on Linux. We only build it there.
libdisk: MacOS: Correct shared-lib name for CAPS/SPS library
libdisk: Support DDAM sectors in IBM-MFM and IMD image handlers
samples / New Zealand Story crack: Remove unused asm.
disk-analyse: Allow specify single-sided operation with --ss option
disk-analyse: Allow start & end cylinders to be specified (-s, -e)
libdisk: Allow track numbering to be adjusted in track-format analysers