Updated OGL documentation and tidied up some code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@714 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/ogl/docs/changes.tex

@@ -2,8 +2,18 @@
 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
 \setfooter{\thepage}{}{}{}{}{\thepage}
 
+Version 3.0, September 8th 1998
+
+\begin{itemize}\itemsep=0pt
+\item Version for wxWindows 2.0.
+\item Various enhancements especially to wxDrawnShape
+(multiple metafiles, for different orientations).
+\item More ability to override functions e.g. OnSizeDragLeft, so events can be
+intercepted for Do/Undo.
+\end{itemize}
+
 Version 2.0, June 1st 1996
 
 \begin{itemize}\itemsep=0pt
-\item First publically released version.
+\item First publicly released version.
 \end{itemize}