Add basic support for Many Cameras.

This is a major step towards many cameras.

Add cell array for the camera relation votes for pairings of cameras.
Clean up camera creation code, make more cameras.
Put scatter plotting for camera relation votes in function.
Comment out output statistics.
Etc.
Make camera-coord tracklets, clean up (theta,r,theta2).

Make the tracklets that are used into camera coordinates, and the ones
for plotting purposes into world coordinates. This should help
prevent "cheating" and also cleans up the main script.

The camera relation is now returned in (theta1,r,theta2) format when
calculated, and it's now is in line with the definition. This also
cleans up main a little bit.
Add cluster finding to main.

Tweaked the estimate_parameters, and renamed. Should do angular
quantities better and has less repeated code.
Add MDS-Map. Still lacks angles.
Estimate angles. First complete estimation.