start blocking out timezone stuff
add TZ to checkins table
timezone != los angeles; start on backfill_set_timezone
basic TZ lookups; no point-in-poly
set timezone, chip away
date formatting
format dates
error handling when formatting dates
notes to self in advance of point-in-poly
dates and date formatting
record timezone at checkin time
slightly better debugging hooks for checking in (remotely, so to speak)
start tracking YMD
documentation
Merge branch 'master' of github.com:straup/privatesquare into timezones
stub out point-in-poly code
start working on poly-in-poly code
add tz geoms
debug timezone stuff
sort of better (?) tz point in poly?