Certs - bugfix cert_whitelist output

* output after cert_whitelist -a or -d purported to be the whitelist entries
  for the requested course, but in fact were all of the entries in every
  course. This commit fixes that.
Eliminate unused import and gratuitous prints
i18n Sequence XModule

LMS-1758
pep8 cleanup
Merge pull request #2296 from edx/cdodge/pep8-fix

pep8 cleanup
Removed French and Korean locales until we add the translation strings
New Discussion forum documentation
Merge pull request #2297 from edx/ahodges-documentation-discussions

Ahodges documentation discussions
Merge pull request #2298 from edx/will/remove-other-locales

Removed French and Korean locales until we add the translation strings
Merge pull request #2290 from edx/jrbl/mdx_stop_printing

Eliminate unused import and gratuitous prints
Merge pull request #2227 from edx/jrbl/fix_cert_whitelist_report

Certs - bugfix cert_whitelist output
Merge pull request #2295 from edx/sarina/i19-xmodules

i18n Sequence XModule
css and html to support RTL
QRF settings check