First round of jQuery updates

MyBB 1.8 replaces Prototype with jQuery. This first round of updates adds jQuery itself, removes Prototype and Prototype related files,
and replaces the old autocomplete with Typeahead.js. This commit is also a start for purging MyBB of XML HTTP requests. We've opted for JSON instead
as it works nicely with newer technologies.
Removes .autocomplete from global.css
Updates mybb_theme_colors.xml with new Typeahead classes
Update jQuery standards
Finishes IP Addresses in PMs
Merge remote-tracking branch 'upstream/feature' into feature
Recount Warning Points