added water obstacles
Finished speeding and slowing obstacles.
Physics.calculateDrag added
fHorizontal and fVertical is now vector totalForce
Merge branch 'master' of https://github.com/ernestaszdanys/freefall

# By julius-bagdonas (3) and ernestaszdanys (1)
# Via ernestaszdanys (2) and julius-bagdonas (1)
* 'master' of https://github.com/ernestaszdanys/freefall:
  Controls
  Refactored game
  Game abstraction WIP.
  test index.js commit.
Merge branch 'Adding_slowing_and_speeding_obstacles'

Conflicts:
	game/js/game.js