- scripts/schhist2web: second file argument was missing when invoking
pngdiff for file addition or removal
- scripts/schhist2web: keep track of columns also after a file is gone
- scripts/gitsch2ppm: extract schematics as PPM files from a specfific git
revision
- scripts/gitenealogy: show the commit history of a file, tracking renames
- scripts/ppmdiff/Makefile, scripts/ppmdiff/ppmdiff.c: compare two PPM
files and highlight differences
- scripts/schhist2web: generate a browseable graphical revision history
of schematics