jump: fixed repeated jumping not always working, some cleanup
dbupgrade: add 'admin' password for admin with empty cryptSalt
jump: more natural jumping while swimming
soundhandler: load correct firearrow sounds
arrows: don't play impactsound double when they hit the ground
turrets: fixed sometimes not shooting
arrowHelpers: fix memory leak
player: fix swinging weapon twice on long shots
world: support persistent changes

This setting allows the server to write directly to the assetDir instead of the buildTarget. Otherwise your changes would be done next time you ran grunt.
Needed for the dev server, otherwise all our changes are for nothing.