Apache Sling integrated, test site adjusted accordingly. Fixes #298

commit 6b8a4d1740969f309e3c68b6729141558676fc15
Author: Basil Brunner <basil.brunner@swissunihockey.ch>
Date:   Sun Sep 22 16:17:32 2013 +0200

    Apache Sling Scheduler with dependency added

commit 81caadfa0621f05dd7f72c8022ad71cbda249ed3
Author: Basil Brunner <basil.brunner@swissunihockey.ch>
Date:   Sun Sep 22 13:45:12 2013 +0200

    Job period set to 300s (5 min)

commit 1ea5feea23c2be903edfbdde2188e296768e23c6
Author: Basil Brunner <basil.brunner@swissunihockey.ch>
Date:   Sun Sep 22 13:43:57 2013 +0200

    Job class is now implementing interface 'Runnable' instead of 'JobWorker'

commit 507cbc986829b105bdb57722044386ec14650be9
Author: Basil Brunner <basil.brunner@swissunihockey.ch>
Date:   Sun Sep 22 13:43:04 2013 +0200

    Job config for job 'greeter' & 'mailpublisher' removed

commit 25b4165cf09ef0b19c1168077ec068d0ce85173d
Author: Basil Brunner <basil.brunner@swissunihockey.ch>
Date:   Thu Sep 19 15:39:59 2013 +0200

    Missing property type added

commit de4abb146ba4413a3c1ae7f857d9e47b3355c708
Author: Basil Brunner <basil.brunner@swissunihockey.ch>
Date:   Thu Sep 19 13:44:48 2013 +0200

    First try with Sling Scheduler