Prevent creation of unnecessary template divs, and rename .single_templates to .single-templates for convention.

Peter fogg/no autoplay studio

Change help button text, fixing LMS-319

Remove test_ike.py, Ike says we don't need it, and it looks like a test.

hides latex compiler in settings tab by making previously specific css s...

Added videoalpha to advanced components in component.py file.

[STUD-177] Fix/cdodge/bad link in activation page

hides latex compiler in settings tab by making previously specific css sibling selector general enough to find and hide the appropriate div

add simple check on whether the expected advanced modules appear in the edit unit page when turned on

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