Fix displayed time offset for TZ offsets prior to -07:00
Store world boss times in UTC
Display UTC as server time instead of PDT
change references to pst to utc (psttime divs)
Add function for timezone formatting

This also adds display support for non-full-hour offsets.

Tested with:
 US/Pacific -0800
 Caracas -0430
 UTC -Z
 Kathmandu +0545
 Taiwan +0800
 Australia/Adelaide +0930