Print warnings while testing
added cython file
made methods private
doc strings
pep8 cython file
added python call and doc strings
removed print
tests and minor corrections
notes change
bento change
minor doc changes
added full paper desc.
corrections to cython file, switched dtype to double
doc test
indexing
made hessian_det_appx public
moved public interface of hessian determinant to corner.py
doc string change
Remove all deprecated rank filter functions
Remove removing deprecated rank functions in to-do