Just a couple of changes to settingsActivity and preferences.
Merge branch 'master' of https://github.com/shochman/VirtualPantry.git
Merge branch 'master' of https://github.com/shochman/VirtualPantry.git
Merge branch 'master' of https://github.com/shochman/VirtualPantry.git
Merge branch 'master' of https://github.com/shochman/VirtualPantry.git
Merge branch 'master' of https://github.com/shochman/VirtualPantry.git
Added sorting comparator classes to foodItem class.
Added comparator classes to foodItem, then sorting methods in Pantry.
Implemented sorting methods in MainActivity.