Ned/move loncapa etc into sandbox

Install steps - Fixes syntax of `update_templates` django command

Jonahstanley/add more tests

Preprocess assets as Django management command

Added requirement for pip>=1.3

Using `task()` reopens the definition of the task, and all we really
need to do is get a reference to the task itself to invoke it.

The :browse_jasmine_<system> and :phantomjs_jasmine_<system> tasks
depend on the :assets task, which needs to receive both :system and
:env arguments. Therefore, new tasks (:browse_jasmine and
:phantomjs_jasmine) are created that do take :system and :env args.
The old :browse_jasmine_<system> and :phantomjs_jasmine_<system>
tasks now wrap the new tasks, passing in <system> as an argument
and 'jasmine' (for :env, since it's hardcoded to 'jasmine' in
django_for_jasmine()).

The LMS/CMS server startup depends on the :assets task, which needs
to receive :system and :env arguments. Since the existing server
startup tasks didn't take a :system argument, a new command called
:runserver is created that does take :system, :env, and :options
arguments. The old server startup tasks are adjusted to wrap the one
:runserver task that does all of the heavy lifting.

Rather than directly invoke command-line Python (and Mako) from the
assets Rakefile, or call an external Python script, use a Django
management command to preprocess all asset template files.

An "asset template file" is defined as a static asset file with a
file extension indicating that it needs to be run through a template
engine prior to Sass/CoffeeScript compilation or packaging with other
assets. The preprocess_assets management command will look through
all of the files listed in the `STATICFILES_DIRS`, preprocessing each
as needed. Preprocessing strips off the special template file
extension, creating a new file in the process.

Currently, the only variable accessible in an asset template file is
the `THEME_NAME`, defined in the settings.

Add partial credit for foldit

I accidently had show_answer instead of showanswer.  This error was hidden by a previous default of showanswer=always.

Dependency installation fixes for Debian/Ubuntu

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

There is no package called `mysql` in Debian/Ubuntu - instead, MySQL is
split into `mysql-client` and `mysql-server`.

Also deeted duplicate package name.

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.