Update doc strings. Change Sed.toarray() to Sed._toarray().
Clean-up variable names
Use Sed().x, Sed().y properties instead of Sed.toarray()
Change .toarray() to ._toarray()
Change .toarray() to ._toarray()
Change .toarray() to ._toarray()
Use Sed().x, Sed().y properties instead of ._toarray().
Use Sed().x, Sed().y properties instead of .toarray().
Change .toarray() to ._toarray()
Add documentation to stack()
Remove extraneous comments.
Merge branch 'feature/segment_refractor' into develop