Added relative times to posts.
Added push_alerts to the WebSockets Hub.
Added simple_delete, purge, and simple_inner_join to the query generator.
Query generator joiners now take not equals into account.
Other query generator stuff and query refactoring.
Fixed a weird padding bug on Tempra Conflux.
Fixed a couple of megapost_min_chars and bigpost_min_chars which I missed.
Fixed a security exploit in the login system.