Angular error extraction from PSFs

The purpose of this ticket is to create a function that takes in as inputs FRDs and Cobra positioner theta, phi positions as inputs, outputting an angular misalignment and uncertainty on angular misalignment to be used in PSF modeling. This function will be well commented regarding inputs, process, and outputs as well as pass errors/warnings if data does not match expected format. This is planned to take 2 weeks, from March 8-March 22nd. This code is to be uploaded to my Github afterward for use in the project.  

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Old description:

I have developed an FRD/angular misalignment routine to determine how angular misalignment was introduced in images depending on the Cobra fiber position's angular misalignment. This has been tested on pupil images for a test fiber and could reproduce the angular distribution (extracted from sig_tot analysis) observed with 3 angular misalignments and an initial theta and phi position. It is worth investigating whether this is would be a productive analysis to do on the telescope.