allow capa poroblems access to anonymous_student_id

fix system->capa_system in capa_problem change for anonid
Reconnecting Token Generator for Annotation Tool
Removed diacritic mention and explained token
Fixed Unit Test Issues
Fix comment formatting and Timezone explanation
Added unit signifier - narrower annotation target
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.
Fixes from @singingwolfboy in PR #3466
BLD-1057: Fix Video player in FF.
Improve the translatability of the paging header
Apply Sarina's code review suggestions
Modified ssl certificate authentication to handle next redirection
Makes small changes in lms and cms both so that user's go to the
original page they intended to if they weren't already logged in
Fix infinite redirect loop on logout caused by django caching
Merge pull request #3493 from carsongee/cg/sysdash_git_info

Adding additonal path to search for git information on sysadmin dashboard
Merge pull request #3666 from edx/andya/fix-translation-string

Improve the translatability of Studio's paging header
Remove unicode character inserted into video_xfields
Merge pull request #3466 from lduarte1991/lduarte-harvardx

Reconnecting Token Generator for Annotation Tool
Merge pull request #3068 from edx/fix/ichuang/capa-customresponse-anonid

allow capa problems access to anonymous_student_id
Merge pull request #3672 from edx/sarina/fix-unicode

Remove unicode character inserted into video_xfields
Merge pull request #2768 from carsongee/cg/ssl-next-url

Modified ssl certificate authentication to handle next redirection