gio-sharp binds the GIO API, which isn't available in Gtk#.

It is not installed in the GAC because we are not ready to commit to API
stability.  Please follow

http://www.mono-project.com/Guidelines:Application_Deployment#Libraries_with_Unstable_APIs

for how to use this library in your application.

Website: http://github.com/mono/gio-sharp

Requirements:
* glib-2.0 >= 2.18
* Gtk# 2.12 
* GAPI 2.12
