Updated user interface to be much easier to understand.
Unstable: Changed F# backend. Need to hook it up to C# frontend. Application has moved from using path strings all over to using a new type (PPTCombiner.FS.AddedPath) which holds more information. This will eventually be hooked into the UI so that more info than just the added paths is shown
Frontend now working but text property for the listbox hasn't been updated yet. Need to wire this up.
Stable: New functional backend fully implemented (and working).