Start to transform library model to enable tree view of its content
Configure library view as tree view
Add missing methods to new model, tempoary fix compile errors
Update some library properies
Some updates
Correctly display informations in the tree
(library) Fix crash at startup
(library) Fix a bug in tree build
(library) Add icons to view
(libraryentry) Store element's position as member (more efficient)
(librarymodel) Delete useless method
(librarymodel) Implements checkboxes to select items
(librarymodel) Refactoring on filenames
(libentry) Improve the way number of columns is computed
(librarymodel) Implements methods to return checked entries
(mainwindow) Refactoring
(library) Reconnect actions update for checked items changes
(gui) Fix library view columns sizes
(refactoring) Fix enums for tables indexes
(refactoring) Rename some LibraryModel methods