Option to turn off dynamic title.

[aqtrans]

I think there should be an option to turn off the 'dynamic title' feature, where Listen changes its window title with every song change. I am using Avant-Window-Navigator, and trying to make a DBus plugin to work with Listen is apparently very difficult (http://awn.wetpaint.com/page/Listen+Plugin), so an option to turn this off would greatly help this plugin.

[zdogde]

Hi, I implemented an option to disable the dynamic title. The patch is attached. I think Theli will include it soon then.

[theli]

(In [747]) patch from zdogde, fixes #619, #617, #611, #612, #610, #485