Initial import of python metrics.
Added number of translational and rotational motions metrics.
Added various performance metrics from the literature.
Added number of tissue punctures metric.
Use needle orientation protocol for all metrics.
Removing print statements used for debugging.
Added RMS Metric

Compatible with Perk Evaluator, allows users to determine the RMS error
associated with points in an image.
Reformatted name
Merge pull request #2 from vinyasHarish95/master

RMS Metric
Fixes #1, Fixes #3: Discard any repeated timestamps.