Add tracker host details to debug logging
Build webui js and gettext
Update Changelog
Replace decode with decode_string
Replace Exception with GError in filtertreeview
Optimized torrentview.cell_data_trackericon

cell_data_trackericon would load the tracker icon with
gtk.gdk.pixbuf_new_from_file_at_size each time it's requested.
These regular requests acumulating to thousands calls to
pixbuf_new_from_file_at_size with a big torrent list.

Now, read the tracker icon from disk once, and cache it.
GTKUI: Changes to autofill save path when creating torrent from remote path