Initialize on every page that has a context_course set

They contain too much incorrect permission checking

Hitting "Add User" with no email address, or trying to add a user to the course
team multiple times

these values are set implicitly at :147, setting them here clobbers them

Feature/cdodge/allow course run in course create

Merge pull request #527 from edx/cale/restrict-us-to-less-than-distribute-0.7,-which-breaks-setuptools

Restrict us to less than distribute 0.7, which breaks setuptools

Rename CourseLocator.revision to branch

Fix some pylint issues

Make render_template mocking clearer

fix for ie bug where drop down menus were still clickable when collapsed

Cale/lms xblock student view

Fix broken Studio signup.feature acceptance test

Fix word cloud modules not exporting correctly.

Jonahstanley/upgrade chrome version

Quiet mongoimport noise during tests

Remove get_preview_module.

"Graphical Slider Tool" integration into studio

which a previous refactoring had replaced. Coverage of locator.py is
100%

This makes the LMS use an XBlock's student_view, rather than an
XModule's get_html to render for display. However, it does not yet use
wrap_child to handle instructor debug information or url rewriting.

[LMS-219]

`world.css_find()` to protect against StaleElementException
in Jenkins.

make user api work with basic auth

    And replace calls with calls to load_preview_module.