Make Camera robust to angle changes

[JAGarcia513]

Distance estimate varies wildly with small deviation in camera angle

[JAGarcia513]

Adjusting for camera angle offset from vertical gives a more accurate distance.

[mattdailis]

Some options:

• Ask mechanical to make a fixed case for the camera (still a problem if the robot itself tilts).
• Hook it up to an accelerometer that can tell us the angle
• Code smarter somehow. (Smoothing?)
  @totallyashes did you guys run into this problem last year?