The barometer is reporting values from positions that are 3 pixels lower than the tip. Fixed that.
Renamed waterTowerView --> waterTowerNode
#114
* Fixed the ground position to be exactly y=350 (y = 0 in model co-ordinates). It was off by a few pixels.
* Ensured that the hose nozzle can go to y=0. It was off by 1 pixel.
* Remove faucet drops once they hit the fluid. It was off by a few pixels in some cases.
* Removed the invisible fluid concept. (See #106) When the water level is very low, fluid is still visible sometimes when seen with a magnifier (2X).
Replaced double quotes with single quotes