/api/delete_sr_image: Ensure valid name submitted.

Previously, if an invalid image name were passed to this endpoint, it
would fail because VCssName would return an empty string and we'd never
check for the validity of the value.

Fixes reddit/reddit#883.
Force logged out state for .wired/.js/.embed.

Thanks to Jordan Milne for pointing out this oversight.
Restrict access to private subreddit data via the API.

Thanks to a report by Jordan Milne.
Add comment explaining subreddit JSON private attrs list.
Fix subreddit header attribute name.
ImagesByWikiPage: protect against c.site not having _id36.

This appears to be happening in some rare corner cases because of the
wiki-embed in the registration form.
Language change to reddiquette on rules page
Fix very minor wording error

Changed "the last you hear of us" to "the last you hear from us." Surely they'll hear of reddit again.
Spam filter settings: add "all" level

This level makes it so that all items of the chosen type submitted to
the subreddit will be filtered initially. This is useful for subreddits
that want to be extremely strict with their submissions, as well as for
many subreddits to be able to go into "lockdown" in the case of a raid
or something similar.
Messages:  Queue yourself no matter what API endpoint used
Only allow admins to modify system_user's multis.
Remove unused poll expando icons.
Update post expando buttons.
Gold partners: remove i18n

These offers change occasionally, are only available in the US, other
parts of these pages aren't i18n, and phrases like "10% off" cause
issues with Babel, so it's just a lot simpler overall to drop this.
Gold partners: Add Rover.com and SOL Republic
Mod log: add support for sticky/unsticky
middleware: Add a request.fullurl.
redirect: Use fullurl instead of url.
Overhaul scraper_q processing.

This is primarily about removing the dead old scrapers in favor of a
streamlined oEmbed-based system.  The new embed.ly scraper uses their
Service API to determine which URLs can be scraped through them. This
removes the giant list of domains and regexes in the code and makes the
scraper_q proc always have the latest list of scrapable domains.
Fix media embeds on promoted links.