implemented base class for a render json tree
added example for sync_text_fields
extended sync field example
added example for sumfields
added testclass for single tasks
add a test for the memcache cache adapter
moved the test to the correct location
Testunit: implemented skip function for tests
Taskplanner: extending the taskplanner logic
Taskplanner: code format
Taskplanner: fixed the task creation
Taskmanager: extended the query for getting tasks