- added support for weapons staggering using the "sequence" field
- replaced AutofireBehavior with PeriodicBehavior and DischargeWeapon, rigged SequencedBehavior to be more precise
- got rid of PlayerFire behavior, since PlayerOnFire did pretty much the same thing
- fixed the displayed value of the overwhelm bar
- overwhelm bar sticks around when overwhelmed
- tracking arrow turns blue for overwhelmed mobs
- staggered the spawning of mobs
- tweaks to the intro script
- completing tutorial now starts the first level
- usability tweaks to the tutorial (waits for distance travelled)
- some weapon visual and attribute tweaks, added rocket2