Resolve "Alignment: missing camera tilt computation"

The current Center of Rotation computation does not compute the pixel column tilt with respect to the rotation axis. Tilts of even 0.5 degrees can produce noticeable blur, especially in the outer regions of the reconstruction.

Closes #134 (closed)

The implementation requires the following steps:

• Implement tilt fitting code by using:
  • 1D correlation
  • multi-line quadratic peak fitting
  • linear regression
• Create unit test with sample data, and expected values
• Implement fit plotting
• Produce docstrings