Restored the old Classes by Category page to live side-by-side with the full Classes...

Restored the old Classes by Category page to live side-by-side with the full Classes by Category grouping.
Also changed the license pages to include the actual license files verbatim rather than duplicated in comments.
Cleaned up the Development Tips page a little fixing some minor issues and wrapping at 80 columns.
Recategorized the WXDEBUG_NEW() macro from the RTTI group to the Debugging group.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52972 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775