Reload updated resources while an analysis pipeline is running

In many use cases resources used by Analysis Engine are updated more frequently than the AE implementation.
Samples of such resources are huge dictionaries which are extended with new names on a daily basis
or statistical models which are re-trained frequently to be adjusted to data from the past minutes.

For a resource updates an analysis pipeline has to be stopped and started manually to pick up the updated resource.
It would be nice if the framework could automate this procedure. In order to do that it must have a capability to detect
updated resources and perform the re-initialization of affected Analysis Engines.

If the pipelines run multiple instances of these Analysis Engines it would be nice if a rolling
update could be performed in a way that the processing of CASes never comes to an halt.
That should be handled in different issues for the CPE and UIMA-AS.