- More features for the profiling, create aggregates and dump them

- More features for the profiling, create aggregates and dump them
on file close.
- Also add a trace modifier to switch on and off the profiling.
- With additional compiler switch the profiling can be completely omitted,
of course it makes sense only when --enable-debug. Because otherwise
there is no tracing, thus no profiling.
- Added a fix for Windows for handling trace files on different devices
 (special handing of ':' )