Resolver finds single objects
Closed issue #7
When an extent is added to pool, existing extents with same id shall be removed
Start of Extent of IObject
Closed #13
Every IObject shall know its extent
Xml tests are running now, Issue #14 is closed
At least... it compiles
Library is now capable to host the window...
Issue #3 can be closed
Infrastructure for saving and loading included
Test is now running
Filter by type by Query is now possible
datenmeister://extent/?type=Task

Fixed issue #6
Dirty Flag is introduced
Is Dirty Flag is evaluated.
Issue #1 can be closed
Save and Load dialog contain information about file extension
Merge branch 'development'