Splits string passed in into fragments. First on spaces, then on _ and then on Capitols/lowercase boundaries. All fragments are added to the same list, all '_''s stripped out are stored in the list as well. All spaces are not placed in the returned list. Underscores are stored per underscore, so a ___ part is stored as 3 strings with 1 underscore.

Splits string passed in into fragments. First on spaces, then on _ and then on Capitols/lowercase boundaries. All fragments are added to the same list, all '_''s stripped out are stored in the list as well. All spaces are not placed in the returned list. Underscores are stored per underscore, so a ___ part is stored as 3 strings with 1 underscore.