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-1422 Followup - Make user-visible title and summary appear per Jon's spec
NOJIRA Clean out obsolete test data (and fix test bug) before starting on CLC-1451
Merge pull request #853 from ctweney/clc-1422-followup

CLC-1422 Followup - Make user-visible title and summary appear per spec
CLC-1397 Fix Travis test failure
Merge pull request #856 from raydavis/raywip

NOJIRA Clean out obsolete test data (and fix test bug)
Merge pull request #852 from ctweney/clc-1397

CLC-1397 Don't show multiple notifications on the same day
CLC-1521 - Canvas - select icons for type
https://jira.media.berkeley.edu/jira/browse/CLC-1521