Changes to 'dev/kolab-cache-refactoring'

[Thomas Brüderli]

New branch 'dev/kolab-cache-refactoring' available with the following commits:
commit b7d4731d9766a6f13d893b39f80512c266fc513c
Author: Thomas Bruederli <bruederli at kolabsys.com>
Date:   Fri Oct 4 19:32:21 2013 +0200

    Let the derrived kolab_storage_cache classes provide the contents of their custom cache record fields

commit 87335f387f9308d24667fd6a62ae6f2dffc2c389
Author: Thomas Bruederli <bruederli at kolabsys.com>
Date:   Fri Oct 4 17:14:34 2013 +0200

    Split kolab_cache table into folder-type specific tables and specialized kolab_storage_cache_* classes; the object type is now implicit