Tapjoy/batsd — pull request #3 by jjrussell (2013-03-29 13:50:36+00:00)
Title: Add slope aggregation for timers

I added a slope calculation to the timer aggregations. This will calculate the derivative of the values stored for the timer for a given retention. This can be accessed with `timers:keyname:slope`

This should solve our rate problem.

What do you guys think?

@obrie @deanxorr @will-ob @mattcarbone