Some documentatin for wxConv classes. But still need to write an overview...

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@6928 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/classes.tex

@@ -40,6 +40,7 @@
 \input countstr.tex
 \input critsect.tex
 \input crtslock.tex
+\input csconv.tex
 \input custdobj.tex
 \input cursor.tex
 \input database.tex
@@ -147,6 +148,10 @@
 \input log.tex
 \input longlong.tex
 \input mask.tex
+\input mbconv.tex
+\input mbcnvfil.tex
+\input mbcnvut7.tex
+\input mbcnvut8.tex
 \input mdi.tex
 \input memorydc.tex
 \input fs_mem.tex