Log Message:
Changes 10.33:
Add pamtosvg.

g3topbm: Add -width, -paper_size.

libnetpbm / most newer programs: Fix bug that produces
plain format output when it should be raw because
pnm_readpaminit() does not set 'plainformat' and most
programs just copy the input pam to the output pam.

pamflip: fix bug with left/right flip of PBM that has
width an even multiple of 8 plus something less than 8.

pnmquant: turn on autoflush when creating seekable file.

install: fix symbolic link pnmdepth -> pamdepth.

build: fix some importinc dependencies.