Updates to desktop file

Add magnet mimetype and tryexec key
Fix exec key to handle files and urls to conform with new desktop-entry spec
Update name, comment and category keys

deluge/data/share/applications/deluge.desktop

@@ -1,12 +1,14 @@
 [Desktop Entry]
 Version=1.0
-Name=Deluge BitTorrent Client
-GenericName=Bittorrent Client
-Comment=Transfer files using the Bittorrent protocol
-Exec=deluge-gtk
+Name=Deluge
+GenericName=BitTorrent Client
+X-GNOME-FullName=Deluge BitTorrent Client
+Comment=Download and share files over BitTorrent
+TryExec=deluge-gtk
+Exec=deluge-gtk %U
 Icon=deluge
 Terminal=false
 Type=Application
-Categories=Network;
+Categories=Network;FileTransfer;P2P;GTK
 StartupNotify=true
-MimeType=application/x-bittorrent;
+MimeType=application/x-bittorrent;x-scheme-handler/magnet;