merging MultipleDataCollectors options into v1.4-dev

extending "native2" data type to match multiple data collectors DAQ scheme.
- additing ExampleTLUProducer (sends TLUEvents with system clocks for timestamps)
- changes to ExampleProducers - only ZeroSuppressed data sending (RAW commented out till next revision)
- factorisation of STARTRUN scripts
- bug fix in terminating GUI LogCollector
What about this code blob? shall we just remove the whole if() block since it's deactivated anyway?