d2k balance changes
change infantry default speeds

infantry was complained as being too fast. Agreed.
Lower combat tank defualt speed

They are a bit fast, and the game is a bit fast.
tank +25 HP, -> 350
harkonnen combat tank slower, tougher
Ordos tank slightly slower
quad slightly slower
tank buffed vs. infantry
fixed oversight from previous change to atreides tank gun
Artillery shell buffed vs. concrete
increase spread of tank shell

Right now they're too easily bogged down by infantry. 

Bazookas remain a strong counter for tanks.
nerf towers

Very OP and make the game too static/ stalemated.
reduced paratrooper cooldown from 280 -> 180 sec.
slight reduction in harkonnen combat tank

To avoid the possibility of it being OP, reducing Hark. combat tank to 440, which divides into 11 tank shots.
nerf tower missile vs. infantry

Due to blast radius was too good at wiping out infantry before they got even close. 
Made it fire with longer burst delay.
Merge pull request #3187 from psydev/d2k-balance

d2k balance changes