Added largely functional bash script for setting up dev environment on macs. Due date of June 1st for open source deadline.
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
Merge branch 'slater/new_mac_dev_script' of https://github.com/edx/edx-platform into slater/new_mac_dev_script
Bringing the create-dev-env.sh script up to date and generalizing for mac and debian-based systems
Added directory structure tests
Draft 1 of cross-platform bash script is complete, but more testing needs to be done
Fixed first stage bugs
Removed starting courseware clone
small fix
distribute fix
small edits mostly taken care of
Successful on mac, almost there on ubuntu
more tests run, some requirements added for graphviz on ubuntu
Added useful requirements and removed problematic scipy
testing numpy change on ubuntu
changed ubuntu strategy for numpy and scipy