Like wingsuit - better air control when falling

air control now - rotating speed vector with reducing player speed (like in real life)
speed of rotation depends on player speed
effect starts after falling 100+ nodes (no sense at small speed)

and optimized sending block sequence when falling fast
and air now have viscosity like liquid, lower at 30000, bigger at -30000
it limiting maximum falling speed to 100 nodes per second (6.4 blocks) at 0 height, ~60 at -30000, 200+ at 30000 

it fixes most falling stuck.
you can teleport to 0,30000,0 and fall to ground without speed loss
or dig deep hole and jump to it

also added horizontal damage at high speed collision (faster than fast_move)