Remove "Appendix E" from doc title; add warning re: identical URLs for ORA
Fix i18n'd strings to be easier for translators to understand

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Put mailto and em tags outside i18n strings

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courseware-error message
Unicode support for course names in reverification flow
Only display active users for the certificate report

Also removes the unnecessary pre-fetch.
For certificate generations we will continue to generate certs for
both active and inactive users.

For the report we only display active users since it was confusing
due to the instructor dashboard only displaying active users.
Merge pull request #3214 from edx/sarina/remove-weird-i18n-strings

Sarina/remove weird i18n strings
Small correction
Merge pull request #3260 from edx/sylvia/documentation/DOC-228

Remove "Appendix E" from doc title; add warning re: identical URLs for O...
Merge pull request #3261 from edx/jarv/limit-to-active-users

Only display active users for the certificate report
Refactored course_nav middleware to isolate the django-wiki hack,
remove unnecessary code, and clarify what it's doing.
Merge pull request #2775 from edx/dcs/wiki-no-middleware

Refactored course_nav middleware to isolate the django-wiki hack, remove unnecessary code, and clarify what it's doing.
This test was failing due to invalid test data. The code properly
strips the onerror="eval()" but the validation does not match the
result.  The reason is that the fields are in the wrong order.  The fix
was to correct the string to match the input string minus the field that
would be removed.  It will now pass.