Added and modified date searching methods
Rewrote Calendar

Rewrote calendar feature to be more efficient: reduced queries from
2200~ queries to about 150~ queries per load. Calendar pages load a lot
faster and memory overloads are no longer an issue.
Merge branch 'Event-Main-Listing'

Conflicts:
	functions.php
	js/script.js
	single-artcolonyclasses.php
	style.css
	template-listing.php