Images are loaded in a separate thread now
Method renamed; BaseModelItem object now take QObject's ownership of its children
Data model now takes QObject's ownership of model's root item
FolderItemCollection is now a child of it's owner (QObject parentship)
AbstractFolderItem objects now use QObject parentship mechanism
Document saving/loading moved to a separate thread
Removed debug info
Exceptions removed
Maximum compression used by default and cannot be changed
Document filename updating fixed
Added file extension to open/save dialogs
Made search widget more convenient (tab order fixed, esc and return hotkeys added)
Note's text caching fixed
Lazy document loading implemented
Show Wait cursor while text document is being initialized
Merge branch 'lazyload' into dev