fix #5: This small commit refreshes the tableView upon item deletion inside the model
Fix a bug that would prevent items being correctly deleted

Reversed the deletion order to keep indices correct.
Also introduced macros to respect Qt version changes,
and removed unneccessary included header files
fix #4: now columns are resized when items are added to the database
redesigned result dialog and data structures
Reset all field values when sort operation has finished
Concerning issue #1:

Disallow items that are already inside the database to be added again
Reorder mainwindow source and header files
Set Proposal box title and add proper layout and headers
fix #1: add a dialog to resolve the problem of having files with the same target...
Added a tooltip describing the item selection dialog for duplicates
correct duplicate finding algorithm due to crashes
Remove unneccessary forgotten dependancy
UPDATE TO VERSION 0.2 =)