NewMagellan ports and verbose comments
WEFC_Toronto remove our memlist_cards.php
BUGFIX posdriver-sph 'redhat'
WEFC_Toronto defear temporary pos/.../memlist functionality

Defeat the coop-specific, temporary-need capture of Member Card#
at member lookup.  We in fact used it very little.
pos background image as symlink, default to empty

The PoS background image was defaulting or being changed to the one
for whatever coop most recently committed, at the moment, People's.
Changed is4c.gif to a symlink, default to an empty image.
symlink should perhaps be gitignored.
I forgot to put the README in this commit.  It will contain:
is4c.gif is used as a background image on the main PoS page.
peoples_coop_logo.gif is an example of a suitable image.
The distributed is4c.gif is symbolic link to, by default,
 a tiny, empty image; a placeholder.
 If you have a better image, change the link to that:
 $ rm is4c.gif
 $ ln -s my_better_image.gif is4c.gif
README for is4c.gif rejig
WEFC_Toronto lane upgrade tweaks and fixes.