Fix#1457, which had gone stale but is now re-opened. The `Coordinate::splitRange` method expects a string of cell ranges, but it is a bit limited. Excel sometimes uses comma for union and space for intersection, and sometimes vice versa. `splitRange` uses comma for union, and doesn't do anything with spaces. This PR adds a new method `Coordinate::allRanges` which handles both union and intersection, and adds a parameter to indicate whether comma means union or intersection (with space meaning the other). Also, since the issue specifically mentioned this as a problem for `ProtectedRange`, an `allRanges` method is added to that class.
oleibman