Add support for localization of (working copy) in SVN
Add support for localization of (working copy) in SVN

Previously we would only support inter-revision diffs generated in
non-English locales. Now, we also support working copy diffs generated
in these same locales.

Testing Done:
Ran unit tests.

Able to upload diffs generated in other locales.

Reviewed at https://reviews.reviewboard.org/r/7341/

sgallagher/reviewboard,chipx86/reviewboard,beol/reviewboard,reviewboard/reviewboard,brennie/reviewboard,bkochendorfer/reviewboard,brennie/reviewboard,beol/reviewboard,KnowNo/reviewboard,sgallagher/reviewboard,brennie/reviewboard,davidt/reviewboard,bkochendorfer/reviewboard,bkochendorfer/reviewboard,chipx86/reviewboard,custode/reviewboard,beol/reviewboard,sgallagher/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,brennie/reviewboard,KnowNo/reviewboard,KnowNo/reviewboard,reviewboard/reviewboard,KnowNo/reviewboard,sgallagher/reviewboard,custode/reviewboard,davidt/reviewboard,custode/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,davidt/reviewboard,davidt/reviewboard,bkochendorfer/reviewboard,custode/reviewboard,beol/reviewboard