Adds a Tango themed look to the Pidgin screenlet using a combination of Gnome and Pidgin icons (released under GPL) that follow the Tango style guidelines. Based on Black 2 theme for 0.3.1 of the Pidgin Screenlet.
Changes from Black 2:
* Reduced brightness of some colours
* Removed some gradients
* Changed dark on hover to light on hover
* Replaced icons with a combination of Gnome (online tick) and default Pidgin (away clock, busy 'no entry' sign and offline cross) icons
* Created 'idle' question mark from tinted busy icon