Switch from desktop.py to webbrowser module

[pochu]

It seems to me that emesene uses desktop.py only for opening links in the default browser.

If that's correctly, we could switch to the python webbrowser module, which does that, and it's included in the python core modules.

That would allow us to remove desktop.py from the source tree.

If this is Ok (i.e. if you will accept a patch) I can work on this.

[pochu]

See http://docs.python.org/lib/module-webbrowser.html

[jandm]

We use desktop.open also in Filetransfer.py to open received files...

[dx]

desktop.py provides desktop integration, webbrowser just tries to figure out which browsers are available. they are different things.