Add a logical argument 'partial' to readASCII that allows one to read
in incomplete message types in ASCII format.



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rprotobuf@735 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Oops, update rpb macro to reflect 3rd argument.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rprotobuf@736 edb9625f-4e0d-4859-8d74-9fd3b1da38cb