HOPDataPrepare.m change.

Removed GoodEdges and GoodIndex.  Moved it to main.
See previous commit.
AlphaCellsSelect2D.m

Improved plotting interaction with user.
HOPGeodesics_main2.m

This is a function that returns what you want instead of a script as
before.
First pass at geodesic triangles

Files are in a subfolder to separate for now.
Added comments.
Merge pull request #7 from dpgoulette/main_script_restructure

Main script restructure