Changes as of Monday (again)

* Alex's protection for infinities and NaNs
* Alex's code for dealing with the Sun at the edges of the frame (camera sensor)
* Tweaks associated with injecting a mock camera image
* HUGE reduction in processing time by ensuring that the subimage for the match filter is smaller than 256x256 pixels
* For each camera, there can now be up to 3 parallel saving threads, which drastically reduces the chances that a filesystem stall will result in having to skip a save
* Added a twist parameter to rotate the pixel locations for fiducials before identifying them
* Miscellaneous fixes

Merging immediately