A bit more polish for gWaei

Very much a recommended release for anyone who has already installed this program. This update adds some nice polish and integration with the gnome desktop on a lot of little things.

I like the new icon which is a book with some japanese symbols. Unlike the previous icon, it gives the users a clue of what the program is. It's not perfect, but it is a huge improvement.

On the techinical side, searches are now at least twice as fast because the searches now retrieve more than one line from the dictionary file per main loop.