This first step replaces FL/x.H with FL/platform.H but keeps a small
FL/x.H that #include's FL/platform.H for backwards compatibility.
Documentation sources in documentation/src/*.dox have been fixed,
but references in other source files need to be fixed in another step.
Dependencies have been adjusted.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12640 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Albrecht Schlosser