Document the changes in this release. Remove the "Documentation" section from the README as it doesn't seem to be very useful there, the link to the online documentation is the most important thing and it's mentioned in the very beginning. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76708 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775