add cartridge's RTL style
fix moblie front-end RTL style
Don't show site selection form when there's only one site

If there's only a single site, there's no need to show this form,
because it can't do anything.
Only show one reply form at a time in a comment thread.
Configurable page var names in pagination querystrings.
Pin max Django version to 1.5.x
Fix tweets/comments css.
Added noshly.com to sites in README
Added mezzanine-foundation to apps list in README
Merge
Added Mahdi Bornazadeh to AUTHORS
Merge