Fixes LMS-1740 by activating the zooming diagram with the spacebar.
add problem reset link to staff debug page
Set up page objects and base test file for staff view and staff debug.
Reworked UI for clarity, removed reload, and added Bok-Choy tests
Added jasmine tests and factored out javascript functions to new file
Adding additonal path to search for git information on sysadmin dashboard
When viewing the sysadmin dashboard courses tag, we also search the git
repository directory in addition to the DATA_DIR to try and find
the course git repo to get hash, last commit, and last editor information
for each loaded course if available.
Code review changes
i18n
Switching to new dashboard API and adding rescore to actions list
Clarify strings for i18n
Fix message handling to be more internationalizable
Note about course staff and discussion admin roles

doc-309
Merge pull request #3663 from edx/markhoeber/documentation/doc-309

Note about course staff and discussion admin roles
Improve the translatability of the paging header
Update Video component UI text
Merge pull request #3650 from edx/sylvia/docs/DOC-206

Sylvia/docs/doc 206
Add VitalSource information
Merge pull request #3617 from edx/sylvia/docs/DOC-359

Sylvia/docs/doc 359
Merge pull request #2686 from edx/feature/ichuang/add-reset-links-to-staff-debug

add problem reset link to staff debug page
Apply Sarina's code review suggestions
Add more links in the PR guidelines.