document order of euler rotation angles

[hokiespurs]

Cameras are XYZ (ZYX is funky)

Objects are ZYX (XYZ is funky)

funky means it rotates around global axis for each rotation. Which isn't really a Euler rotation

[hokiespurs]

The demoBeaver experiment is an example showing that the output rotation does not match what photoscan calculates... need to fix this.

[hokiespurs]

Euler-XYZ is: z-y’-x″: yaw, pitch and roll

Currently the output is: Rx = Pitch Ry = Roll Rz = - Yaw

• [ ] change object placement to use same convention
• [ ] change camera input to be Roll, Pitch, Yaw
• [ ] change XYZtoUV, since the input values will be different
• [ ] output Roll, Pitch, Yaw in the correct convention