clean checkin of changes made for response time mirt

Summary:

Test Plan:

Reviewers:

CC:
time spent mindlessly linting
it feels SO, so wrong being forced to put spaces around exponentiation (**).  Order of operations for goodness sakesgit status  Maybe this is my little taste of what poorly formatted code looks like to those trained in the art.
permutation of indentation
removed some debugging code
changes in response to code review
Merge branch 'master' of https://github.com/Khan/analytics