Enhance any swing components with a busy state

JBusyComponent works as follow:
- Provide a BusyModel that allow you to maintain and control busy properties for your component.
- A view that is the enhanced component that can now be busy
- An UI for render by overlay the busy state
- BusyIcon for smart and simple to use icon that can render a progress bar

The BusyModel
A BusyModel is the data model controlling busy properties of some components. When the model is on a busy state, the view becomes inaccessible and a smart overlay animation show it.

This animation can include a progress bar that reflet the underlying job progression or use a BusyIcon. If you enable the cancellable property, a cancel button will be shown also.