Release to go with RNAAS

This release matches the version in the upcoming RNAAS publication. In this release there are some fixes to plotting to make it slightly more robust.

v0.1.1: :memo: update readme

Initial release of vetting. This package contains the first, simple test for transiting signals; a simple centroid test which will tell the user if there is a significant offset during transit for input transiting signals. The centroid test takes in a lightkurve.TargetPixelFile object, or a list of lightkurve.TargetPixelFile objects of a single target and performs a simple centroid test, returning a statistical test to the user.