Fixes imgur album fix not working for gif albums

(cherry picked from commit e20ae61452a5171227e2689d5047d7b6e3beda8f)
Version 3.2beta3
Fixed #177: Support for .gifv on Imgur

Supports it by changing it to a request for .webm.
Seems to work (on the first dozen links in
imgur.com/r/gifv).  Don't know if it works in a gallery
of gifv's or other less common scenarios.
Added French translation, by JB Marcon goofy@babelzilla.org.

Includes making text such as CTRL, SHIFT, ALT, and
fields related to disabled sites newly localizable.

Rebase by David Adler fixes merge conflicts and moves
Right Mouse Button localization to be after ALT.

Need French (and other language) translation for
Right Mouse Button.
Fixed 'Right Mouse Buttom' i8n

Typo in English and added Franch translation
from JB Marcon.
compatible with 36.0a1
Adds gyazo.com (as gif, not forced to mp4)

Change by Hakkin, rebased by David Adler to collapse
reverted changes and to rebase onto current master.

Original version had support for displaying mp4
movies in pop-up, but it didn't work on some operating
systems; for details see issue #176.

Fixed #176.