More improvements

Finally I'm on holidays. Also I have finished refactoring the core API to work with listeners (take a look at previous post).

Today I want to post about a couple of new user interface improvements I have made thanks to the previous work.
Now, when the user loads some data (image, shapefile or WMS layer) a progress bar is shown:



And once the data is loaded, depending if the data can or can't be loaded, the label in the layer explorer change its color to show the final state: