Some work on the tutorial
Implementing the accessors for the properties "startup-id",  "transient-for",
and "opacity".
Work on the API documentation
Implementing gdk-event-get-scroll-deltas
Implementing GdkEventSequence and GdkEventTouch
Removing cffi properties. Implementing more accessor function.
Commenting out the implementation of cffi properties. Changing the
implementation of gtk-label-set-line-wrap and gtk-label-set-line-wrap-mode
Adding the property "message-area"
Correcting the implementation of the class gtk-offscreen-window
Correcting the exported symbols for gtk-vseparator-new and
gtk-hseparator-new
Implementing the class gtk-style-context
Implementing the functions gtk-widget-get-preferred-height-for-width and
gtk-widget-get-preferred-width-for-height
Removing the cffi property "windows"