updated to test close() on filtering streambufs

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43394
only call pop()) if chain is complete

svn path=/branches/iostreams_dev/boost/iostreams/; revision=43396
removed duplicate method declaration

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43397
close only calls pop if a chain is complete

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43398
added missing :

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43454
replaced BB v1 link with v2 link

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43455
added hyperlink to regression reports

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43456
fixed copy/paste errors

svn path=/branches/iostreams_dev/libs/iostreams/; revision=43457