v0.1.0

• Add support for connecting signals defined in a builder definition. 5fa97f1
  There is documentation showing how to use this.

• Include the target object (such as *gtk.Widget or *gtk.Button) as the first parameter of signal callback functions. 0eec544

  For example, this

  da := gtk.DrawingAreaNew()
  da.Widget().ConnectDraw(func(cr *cairo.Context) bool {
  	// draw something in the context ...
  	return false
  })

  becomes

  da := gtk.DrawingAreaNew()
  da.Widget().ConnectDraw(func(widget *gtk.Widget, cr *cairo.Context) bool {
  	// draw something in the context ...
  	return false
  })

  This better matches the C api, and can be convenient when connecting signals in builder defintions.
  This is a breaking API change.