Generate version number in fluid's about panel automatically.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10331 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Fix documentation (more typos and formatting).


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10332 ea41ed52-d2ee-0310-a9c1-e6b18d33e121