Added widget hierarchy to Appendix A.
Fixed doubled-up fl_input and fl_choice links (names are not
case sensitive...)
Added FLUID tutorial from Craig P. Earls (none of the sources yet,
just the docos and images)
git-svn-id: file:///fltk/svn/fltk/trunk@258 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
