More work on the videos page and also the language page

Reorded the language page sidebar to match the video page one better.

Move "Get Embed Code" link to the right of the Subtitles header.
Changed header to read "XX languages" instead of "View Subtitles
(XX)".

Removed extra top margin on the description in the language page
sidebar.

Refactored language list code so that it's all in 1 template.  Split
up the embed code and the sharing code into 2 templates
Added icons for the edit/upload links