cmake: by default build shared library on Unix and static on Windows


git-svn-id: svn://svn.code.sf.net/p/zenlib/code/ZenLib/trunk@490 f098ebc7-0e84-4588-8ad0-e2271d839f10
cmake: version bump


git-svn-id: svn://svn.code.sf.net/p/zenlib/code/ZenLib/trunk@491 f098ebc7-0e84-4588-8ad0-e2271d839f10