Created the water tag for buoyancy
Updated buoyancy class to make an object float on water
Updated scene to put in water buoyancy
Updated water level to use the top level of the collider it hits
Merge branch 'feature/boatControls' into feature/addLeapMotionToBoatPrefab

* feature/boatControls:
  Updated water level to use the top level of the collider it hits
  Updated scene to put in water buoyancy
  Updated buoyancy class to make an object float on water
  Created the water tag for buoyancy
Comment out unused right hand variable