V 0.2:
 -Object FieldForm
 -Validation form
 - 

V 0.1.5.2:
 -Widget's description

V 0.1.5.1:
 -Fix bug __create_widgets button last position grid

V 0.1.5.0:
 -Add functions set_labels a Form
 -Grid expand Form
 -Update Documentation

V 0.1.4.1:
 -Initial version Library
