Loki specifications

Educational Software: E-book Software; eBooks; Fine Arts Software; Genealogy Software; Health & Fitness Software; Language Software; Map Software; Math Software; Other; Reference Software; Religious Software; Science Software; Student Tools; Teaching Tools

Added disclosure triangle control.
Reorganized main window for greater clairty; added the ability to separately enable/disable unit entry and show all windows.
Now accepts the Enter key for Enter and the "#" key for erase.
Changed keyboard shortcut for recprocal to "\".
Now allows entry into any register.
Now uses new preference saving code. It will save preferences to the application directory if it can't use the regular place.
Now uses sheets on OS X.
Improved and standardized Copy and Print; added File Save.
Closing the main window now exits the application.