Start making comprehensive calc tests
Finish calc.py tests; add docstrings, etc
Enable coverage for calc module; split off tests
Add docstrings; test divsion by zero at Response level
Pep8 fix
Merge branch 'master' into pbaratta/calc-tests
Fixed docstrings and other comments from PR review
Add few more tests; fix a small bug with parallel resistors
add hack to assets.rake to unblock the release train
fix Edge login to use the updated POST-back URL /login -> /login_ajax
Use latest CodeJail to prevent bytecode writing.
Added largely functional bash script for setting up dev environment on macs. Due date of June 1st for open source deadline.
Give all response types an id attribute.  CustomResponse had one, with a silly name.  Use it for all ResponseTypes.
Pass safe_exec a slug, the problem or response id; Use the latest CodeJail, with slug support.
One more tweak to CodeJail
Added documenntation to the docs folder and edited the mac bash script in response to tests
Updated documentation in doc and README and made some small edits to bash script for added robustness
Merge branch 'slater/new_mac_dev_script' of https://github.com/edx/edx-platform into slater/new_mac_dev_script
Removed numpy and scipy files
Updated documentation in doc and README and made some small edits to bash script for added robustness

Added documenntation to the docs folder and edited the mac bash script in response to tests