[incr Widgets] Manual Pages

• ButtonBox
• Dialog
• DialogShell
• EntryField
• FileSelectionBox
• FileSelectionDialog
• MessageDialog
• OptionMenu
• PanedWindow
• PromptDialog
• PushButton
• ScrollBar
• ScrolledCanvas
• ScrolledFrame
• ScrolledListBox
• ScrolledText
• SelectionBox
• SelectionDialog
• SpinInt
• Spinner