Making session store as Mongo.
Adding gravatar field and calculation logic.
Adding crypto module for gravatar calculation.
Preventing meet up toggling initing if the element doesn't exist.
Adding gravatar URL throughout site if there isn't a profile photo set (and gravatar exists).
Adding update script to update all Users to trigger the gravatar pre-save hook.
Adding update script to update all Meetups, setting a draft state (later overwritten) and the published date (based on the meet up date, 7 days before (average)).