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.
JavaScript extentions doc update

doc-255
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
Merge pull request #3382 from TheJJ/patch-1

fixed retry invokation for calling setState
Bok-Choy video tests batch2
Reword docstrings for bok-choy video tests