Added an option to save the test report to a file

[koleror]

No description provided.

[mjhea0]

@koleror it looks like each of the Travis tests are failing with:

The command "flake8 --max-line-length=100 --max-complexity=10 --statistics --benchmark django_slowtests" exited with 1.

Can you take a look at this?

[koleror]

I know but did not really want to modify the run function too much, as it's been copied/past from unittest, with only one additional line (the last one before the return), so I wanted to make the change readable :)
But I can split it if you prefer.

[mjhea0]

Just update this line, changing the max-line-length and max-complexity to get it to pass for now.

flake8 --max-line-length=100 --max-complexity=10 --statistics --benchmark django_slowtests

[koleror]

Ok, thanks!
I'll do it now