Fixes gh-608 - loadout "first" will be given on join and each battle after

When a player joins a warzone for the first time, they will be given a
loadout called "first" instead of the default loadout. After they have died
once, they will receive the default loadout. Players will also be assigned
the "first" loadout every battle if they are on the default loadout when
the battle ends.

I do not know how servers will deal with players who might constantly leave
and rejoin the zone in order to get the loadout back. This could be fixed
with a war change if it becomes necessary (maybe remember the player until
the battle ends). But, as always, if a server does not want to have a
"first" loadout in a warzone, they do not have to create one.