change log added


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1@2018 29e17f8d-cf37-471e-a288-72cc03a76eda
pkg-config configs updated


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1@2019 29e17f8d-cf37-471e-a288-72cc03a76eda
pkgconfig again


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1@2026 29e17f8d-cf37-471e-a288-72cc03a76eda