Adding infrastructure for task / scheduler support
Change base class as  current is deprecrated
First iteration of update task logic

Need some love and test logic.
Ignore storage page id

Ignore page id on search for out of date items.
Switch to unique identifier.

Used item name is not unique on mass update.
Cleanup as updating items works as task
Remove some plugin configuration options
Evecentral URI can now configured in extension manager
Merge pull request #7 from henning-gerhardt/feature_scheduler_support

Fix #3: Feature scheduler support