- Check for pkg-config earlier, pkg-config 0.9 should be sufficient according to configure.
- Add pkg-config m4 file to be able to check for pkg-config where it is not installed.
- Fix typo in ChangeLog, add recent buildsystem changes.
git-svn-id: svn+ssh://svn.gna.org/svn/warzone/trunk@2541 4a71c877-e1ca-e34f-864e-861f7616d084