Merge pull request #1 from veroniqueaubry/develop

Update README and language files
Fixed nonce and post_type class in quick/bulk edit box and added "None" option to language selector.
Fixed nonce verification to reflect new method.
Fixed localize_url to actually drop $force_admin (change didn't commit last time). Fixed set_post_lang logic.
Commenting update.
Updated text for the skip_default_l10n setting.