Allow "override once per patron" at checkout

[Thomas Berezansky]

Specifically for patron-derived overrides:
PATRON_EXCEEDS_OVERDUE_COUNT
PATRON_BARRED
PATRON_EXCEEDS_CHECKOUT_COUNT
PATRON_EXCEEDS_FINES

This is done by:
Adding support for a list of "reported" overrides to util/network.js
Using that in Checkout to build an auto-override list for the current patron
Passing that list in at Checkout

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;<email address hidden>/override_once

You need only add the remote once, regardless of how many branches you wish to look at.
To add this repo as working:
 Read-only (git protocol):
  git remote add working git://git.evergreen-ils.org/working/Evergreen
 Read-write (ssh protocol):
  git remote add working <email address hidden>:working/Evergreen

Once you have the remote added you can check out this branch:
git co -b override_once <email address hidden>/override_once

[Thomas Berezansky (tsbere)]

I added an extra commit to throw a notice that the four overrides will "stick" for the patron session.

Also rebased. <_<

[Jason Etheridge (phasefx)]

pushed to master with a few tweaks