Generally tried to make them more reliable and execute quicker.
They all now load the listen script as a trick to make sure input
sources are fully read, but also terminate() at appropriate times
so that they don't take more time than needed. They're also all
serialized with the 'comm' group so listening on a port doesn't
interfere with the communication tests.
* simple testcase for file refresh (check for changes) and streaming reads
* add events for simple put and delete operations
* fix bugs in table filter events (type for first element was wrong)
* and I think a couple of other small bugs
