Change set-gobject-property to g-object-set-property and
get-gobject-property to g-object-get-property
Generalize the calculation for the size and offset of the structures
g-parameter and g-value
Implementation of the function pango-cairo-show-layout-line
Correcting some typos
Do not reference deprecated functions
Some work on the implementation of GtkWidget
Adding the implementation of g-menu