TeamLeads Plugin v0.2 for B3

Features:
- displays "Red/Blue Team Leads" or "Teams are tied" according to team scores
- displays "X frags left" for each team
- displays "X minutes left"
- displays "first kill" message
Some features are inspired by Q3 sounds and messages.

Requirements:
- B3 v.1.1.4 minimum
- TDM server

Install:
- copy teamleads.py into the b3/extplugins directory
- copy teamleads.xml into the b3/extplugins/conf directory
- add the following line into the plugins section of b3.xml (set the priority parameter according to other running plugins): <plugin name="teamleads" priority="18" config="@b3/extplugins/conf/teamleads.xml"/>

Config file:
- settings/minlevel : sets the minimum level to use !tlstfu
- settings/fragsleft : sets the number of frags remaining to display the "frags left" message
- settings/timeleft : sets the number of seconds remaining to display the "minutes left" message

In-game command:
- !tlstfu : enable/disable silent mode
