Fit report for calibration routines

[saransh13]

After the calibration finishes, we should generate some report which can quantify how good the calibration results are. A few examples could be

1. histogram of delta between the picked points with their ideal location for each Debye-Scherrer (DS) ring and a cumulative histogram for all DS rings.
2. standard deviation of the delta between picked points with their ideal location for each DS rings.

We can also add other similar metrics. This will be handy tool that can be used for uncertainty estimation due to calibration, include in supplementary results of manuscripts etc.