CLC-1397 Copy notification timestamps into new occurred_at column so we can query on them
CLC-1397 Don't insert more than 1 notification of the same type on the same day
CLC-1397 Send dates in a way that will hopefully make postgres happier
CLC-1397 Fix data type of uid (it's a string)
CLC-1397 Fix Travis test failure
Merge pull request #852 from ctweney/clc-1397

CLC-1397 Don't show multiple notifications on the same day