Add rtl support to the multilingual plugin.
RightToLeft plugin: Merge changes into correct branch.
RightToLeft plugin: Add additional css.
Revert "Add rtl support to the multilingual plugin."

This reverts commit cb204a7ccab091a71e58ae4a7f84356b1ef35402.
Merge branch 'feature/multilingual-rtl' of github.com:vanilla/addons into feature/multilingual-rtl
RightToLeft plugin: Add css class to sender, remove check for 'realLocale'.
Merge branch 'feature/multilingual-rtl' of git://github.com/vanilla/addons into feature/multilingual-rtl

* 'feature/multilingual-rtl' of git://github.com/vanilla/addons:
  Revert "Add rtl support to the multilingual plugin."
RightToLeft plugin: Erase memories of Todd.
Fixes and tweaks to the right to left (RTL) plugin.

- Add more RTL locales codes.
- Check which of style_rtl.css or admin_rtl.css should be added.
- Add some doc comments.
- Add an icon.
RTL plugin updates.

- Remove the custom.scss file and put css in the proper files.
- Remove bower, js, and font from the gulp file.
- Change permissions on some files.
Remove custom.css.
Merge pull request #141 from vanilla/feature/multilingual-rtl

Add rtl support to the multilingual plugin.