Switch PDF Textbooks to use portable URLs
adding django admin command to change enrollment
fixing example
grammar
added jj to the author list
fixed retry invokation for calling setState

to successfully call a function with parameters by setTimeout,
it needs to be a function that will be called by setTimeout internally.

this patch actually enables multiple tries for calling the setState function.
Fixes #3409
JavaScript extentions doc update

doc-255
Fixed toggle cheatsheet not working on component editors.
STUD-1514
remove location of item from loc_mapper and cache
Merge pull request #3368 from edx/waheed/stud1514-toggle-cheatsheet-not-working

Fixed toggle cheatsheet not working on component editors.
Merge pull request #3250 from edx/zub/bugfix/std1441-editdiscussioncomp

remove location of item from loc_mapper
User doesn't exist in verify student banner toggle off view
LMS-2510
Merge pull request #3410 from mlkwaqas/waqas/lms2510-banner-toggle-off

User doesn't exist in verify student banner toggle off view
Merge pull request #3267 from edx/markhoeber/documentation/doc-255

JavaScript update in developer documentation
Merge pull request #3396 from edx/jarv/change_enrollment_cmd

adding django admin command to change enrollment
Fixing start-time and end-time related Jasmine tests.

BLD-1013
Merge pull request #3350 from edx/valera/l63a

Fixing start-time and end-time related Jasmine tests.
TESTS: Add tests for fix of end-time in the video player.

BLD-662
Merge pull request #3275 from edx/valera/l52a

TESTS: Add tests for fix of end-time functionality in the video player