Improve review assignment notification UI
'New review assignments since' UI.
README nit.

Stephen Murdoch report.
papersel might be unset, causing a warning
Correct mail formatting bug.

Reported by Umut Acar/Jan Vitek: When sending a mail to many users at once,
the To: field would get garbled.
Miniderp
Chairs can always always always view all papers.
Allow straight JSON in settinginfo_include
Fix <label> on settings page for radios.
Responses to the reviews are only collected when authors can view reviews.
Derp
Rederp
Double plus derp
Triple salchow derp
Accept 'UTC+xxxx', 'UTC-xxxx', even though PHP wants 'GMT'.
'Add PC member' links actually default to adding a PC member.

John Tang Boyland report, as were some others.
batch/addusers.php can take CSV as well as JSON.

And argument name is --modify.
Mention CSVFILE as option.
Include class name in caller_landmark().
Warn if contactTags is requested [by has_tag], but it doesn't exist.