Added bone structure for FL documentation

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13394 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/docs/latex/fl/tusage.tex

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+\section{Notes on using the reference}\label{referencenotes}
+
+In the descriptions of the wxWindows classes and their member
+functions, note that descriptions of inherited member functions are not
+duplicated in derived classes unless their behaviour is different. So in
+using a class such as wxScrolledWindow, be aware that wxWindow functions may be
+relevant.
+
+Note also that arguments with default values may be omitted from a
+function call, for brevity. Size and position arguments may usually be
+given a value of -1 (the default), in which case wxWindows will choose a
+suitable value.
+
+Most strings are returned as wxString objects. However, for remaining
+char * return values, the strings are allocated and
+deallocated by wxWindows. Therefore, return values should always be
+copied for long-term use, especially since the same buffer is often
+used by wxWindows.
+
+The member functions are given in alphabetical order except for
+constructors and destructors which appear first.
+