Changes to 'buildsystem'

[Christian Mollekopf]

New branch 'buildsystem' available with the following commits:
commit f01b8f1a613901baa19bfc25a8da07213fccace7
Author: Christian Mollekopf <mollekopf at kolabsys.com>
Date:   Sat May 5 13:14:36 2012 +0200

    We don't need the custon FindKolabKDELibraries and can use one installed by kdepimlibs instead. Specify required package versions.
    
    FindKolabKDELibraries also erroneusly produced absolute library paths, which makes it i.e impossible to use a distro libkolab to build
    kdepim-runtime (because you can't get the distro libkolab to use your compiled version of kdepimlibs).