Fixed transform_url function in WikiAccessMiddleware.

In the current implementation if the path prefix contains the
wiki_path value it gets deleted. For example if the prefix is
'/courses/edx/math101/2014' and wiki_path is '101/' the final
prefix becomes '/courses/edx/math2014'.

LMS-2556

Don't scrape unnecessary strings for i18n

Add info about removing prompt

Document our development/review process

Configure youtube stub for bok-choy

Release for Apr 27, 2014

Sarina/042914 language update

Change signin control from text list to buttons.

Show a success button at the top of the Progress page

Correct copy/paste error in Adaptive Hint section

Forums visual styling adjustments

Add test in import code to make sure two overlapping courses aren't imported

install and set up paver before using it

Switch PDF Textbooks to use portable URLs

bug fix - wrong problem name

doc-289

Fix note formatting problem in JSInput doc

Update label information; correct typo; add XML to PWAH

XBlocks are something initialized before all resources (url) are loaded

Wraps long lines in bulk email messages.