Install steps - Add numpy requirement in manual installation steps

Feature/christina/metadata ui

When `pip install -r requirements/edx/pre.txt` is omitted before running
`pip install -r requirements/edx/base.txt`, it would cause API versions
mistmatch when `make cms` is run. `make cms` would automatically run pip
with pre.txt and install a different version of numpy, *after* base.txt
and post.txt have been run through pip.

small tweaks to overview doc

Change Ruby gemset to edx-platform

The `create-dev-env.sh` script now creates a gemset called edx-
platform, so make sure that this matches.

The right thing to do would be to have `create-dev-env.sh` peek at
this file and create a gemset with the appropriate name.

Slater/new mac dev script

Merge branch 'feature/christina/metadata-ui' of github.com:edx/edx-platform into feature/christina/metadata-ui

Added note about the current state of support for debian based systems to accurately reflect state of development

Fix js that prevented single step OE problems (ie only self assessment) ...

require distribute >= because there is an old branch out there that messes up the build server

Fix/vik/speed up oe test

Add test and functionality for trailing period in [Numerical/Formula]Response

Merge branch 'feature/christina/metadata-ui' of https://github.com/edx/edx-platform into feature/christina/metadata-ui

RFC: removing the request debugger entirely.

updating django minor release