Replace sweave code with manual CodeInput/CodeOutput for now so this
is buildable again with protobuf-2.5 library which doesn't like our
unittest.proto.



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rprotobuf@880 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Better fix.  Add a new proto with only the examples we need for this
paper rather than pulling in all fo the complexity of TestAllTypes or
faking it with CodeInput/CodeOutput.



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rprotobuf@881 edb9625f-4e0d-4859-8d74-9fd3b1da38cb