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This reverts commit dc8ca652.

This reverts commit bad1c9fb

Add array_unique to array_merge calls, so checking for more than 11 reservations should work properly (should fix #11)

Simplify _validateDate calls, also check for valid prep times before adding preparation events to cal

Replace moment.js with day.js. Also don't be lazy, do date stuff properly. No more blind search+replace!