Bugfix: incorrect work conflict of different addresses.
Move old ScheduleData-files if folder 'Old'.
Move ScheduleData-files if project ScheduleData.
Merge with GUI.
Added import and export methods.
Rename class ImportAndExport.
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Merge branch 'model' of https://github.com/Lozov-Petr/Schedule into Lozov-Petr-model

Conflicts:
	SEE/Editor/Editor.csproj
	SEE/Editor/Helpers/ExObservableCollection.cs
	SEE/Editor/Helpers/ObservableCollectionEx.cs
	SEE/ScheduleData/Helpers/ExObservableCollection.cs
..
..
..
Merge branch 'Lozov-Petr-model'
Changes after merge
Add: Export to Excel