make embargo template theme-able

Use "Stanford-style" theming to enable you to put your own embargo
notice up.
missing themed embargo page fails safely to unthemed
adding django admin command to change enrollment
fixing example
grammar
Added watchdog to Paver requirements
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.
Release for Apr 22, 2014
Merge pull request #2834 from edx/sef/theme-embargo-master

make embargo template theme-able
Merge pull request #3424 from edx/ora2/release-2014-04-22T16.55

Release for Apr 22, 2014
Wait for ajax post after changing language
Merge pull request #3404 from edx/watchdog-in-paver-reqs

Added watchdog to Paver requirements
BLD-1000: Download handout.
Move experiments.rst into the en_us directory
Merge pull request #3428 from edx/zoldak/fix-lang-test

Wait for ajax post after changing language
Merge pull request #3369 from edx/anton/download-handout

Video: Add Download Handout
doc for LMS-2525: feature changes for student enrollment
Merge pull request #3388 from edx/ahodges/documentation/LMS2525

Ahodges/documentation/lms2525
Merge pull request #3429 from edx/move-experiments-rst

Move experiments.rst into the en_us directory