finish spot analysis for peak intensity calibration

[bbean23]

Add spot analysis code to analyze peak intensities of a heliostat. The necessary features include:

• 3d visualization of spot #96
• hotspot peak value computation [e, aj] #99
• cross-section visualization of a spot #102
• automatic powerpoint generation #104
• over-exposed pixels visualization [am]
• filling in BCS gaps #101

Additional features that might be helpful include:

• directory watcher image source, to introduce new images to the pipeline as they are added to the source directory
• image translation correction based on tower fiducials
• pixel intensity to actual flux correction [s]
• image scale tagging (how many meters is a pixel?)

Features that were implemented as a part of #82 include:

• area of interest cropping [af]
• over-exposure detection & warnings [ag]
• tagging images as NULL (aka dark aka not exposed to heliostat) or active (aka active aka exposed to heliostat) [ah]
• averaging multiple images [u]
• image subtraction, to get relative flux to a NULL image [a]
• filters (gaussian and box) [ai]
• logorithmic intensity scaling [ak]
• false color visualization [al]
• automatic BCS target detection