Added "fork" directory, EMC

Forked plugins contain fixes here and there.

Extended Map Configs was forked to change a method call to properly
update convars before methods that run on config execution are called.
Updated Round End Music

Properly tagged enabled variable as global.
Removed OnConVarChanged() in favor of checking the convar in
OnConfigsExecuted().  This means that round end music won't work on the
fly, but we won't need to deal with loading issues.