Fix typo in echo_long celery test function
Scripts use to munge files for mass mailings

Nothing that special, just want to get them backed up so checking them
in.
Merge branch 'master' of github.com:Stanford-Online/class2go into sef-work
Merge branch 'master' of github.com:Stanford-Online/class2go into sef-work
Use vi key bindings for production term sessions
bugs-by-dev report: current list of devs

Still hardcoded, bleh
Allow users to see course materials by section from dropdown #858

Extends get_course_materials function to return materials for single
section. Meant for viewing live sections, thus why there is no dropdown
for instructor's edit view.
Fix anchors for table of contents.
Add a few missing words.
Add navigation div to be used uniformly
	modified:   templates/exams/videotest.js
	modified:   templates/exams/view_exam.html
Address repetitive feedback described in #1714

Also add some comments in prep for refactoring code

	modified:   templates/exams/view_exam.html
Merge branch 'master' of https://github.com/Stanford-Online/class2go into wescott-master-exercise-work
Address #1713 and add some exam navigation styles
	modified:   templates/exams/videotest.js
	modified:   templates/exams/view_exam.html
Merge pull request #1697 from Stanford-Online/kluo-858-materials-by-section

Allow users to see course materials by section from dropdown #858
Deletable more cautious about ContentGroup removal

* ContentGroup was always being referenced, even for Deletables without
  any .contentgroup_set attribute. This threw an exception when you
  deleted one of these objects (such as Announcements).  Now we'll be more
  defensive.
  (fixes #1749)
* Some cleanups to comments
Merge branch 'master' of https://github.com/Stanford-Online/class2go into wescott-master-exercise-work

Had to add back in some of Jason's stuff and mine when resolving conflicts

Conflicts:
	main/templates/exams/view_exam.html
Starting save button
Merge branch 'master' of https://github.com/Stanford-Online/class2go into jbau-save-button
Merge pull request #1753 from sethoscope/typos

fix minor issues in README files
Updated linux installation instructions.

- Added instructions for creating MySQL database.
- Un-hard-coded virtualenv location.  (Debian puts it in /usr/bin.)
- Moved /usr/local/bin/ path check up to support `which virtualenv`.
- Added numpy installation.
- Correction: STATIC_ROOT_DIR -> STATIC_ROOT