2020-05-14 updates

- Added more "labels" to HUD:

- - for rate of fire = ROF , which is computed as max fire delay is 0.25 and each frame has a delay. And the fire delay is decreased by an amount equal to ROF*delay. If the amount drops to equal or less then 0, player fires another round.

- - for crit rate = which is a probability that player will do 1.5 x dmg 

- Added Labels for bonuses

To be added:

- bona + swarm fighters

- big boss