alimanfoo/petl — pull request #293 by andrewakim (2014-10-15 22:41:40+00:00)
Title: Resolved Issue #142

This change resolves issue #142.

The following changes were made:
* Online algorithm to output mean and variance (used to calculate standard deviation)
* Added unit test for new functionality. This was done to test accurate output of online algorithm functionality since progress output, specifically batch times, can vary by user.
* Updated doc string in progress()