TypeScript: moment and moment-timezone don't play well together

[sfrooster]

Several things here:

1. moment-timezone doesn't have TS support like moment does (I see this is a separate issue)
2. current moment-timezone definitions don't include format()
3. current moment-timezone definitions fail compilation (MomentTimeZoneFormat is not defined)
4. momentTZ.tz() produces a Moment which is incompatible with moment() (Operator '<=' cannot be applied to types 'Moment' and 'Moment'.)