PICARD: fix POD errors
(cherry picked from commit 33b3c2bf2d0a500ba64100f5c8d1c251c6550d64)
sun264: incorporate recent updates to recipe descriptions
(cherry picked from commit 9d6c6878cab165a28422d7fb9d784a57777dbc13)
sun265: incorporate recent updates to recipe descriptions
(cherry picked from commit 6e9cd1315c306c9c4b1b829af9b53e332ade367c)
docs: build as PDF instead of PostScript
(cherry picked from commit 2d7b5ad3164d766a5981f2da1293a2438f1a084f)
heterodyne: Convert PARAM2 to pixels for UNMAKECUBE.

This involve adding some PIXSIZE arguments to pass the pixel scale to
UNMAKECUBE.  Only use the original WCS scale conversion if PIXSIZE is
undefined.

This hadn't bitten us before because we normally choose Gauss or
Nearest as the resampling method.  Without the correct scaling, the
size passed from the recipe parameter in arcseconds, convert to pixels
could be many times too large, and the UNMAKECUBE command would
timeout (or run for days).  In fact PARAMS2=4 seems as large as you
can go with ORAC-DR timing out on the JAC high-performance desktop
computers.
(cherry picked from commit c0d4d825a332f559f59b16312d47431505c3e29f)