EclipseWriter: Don't mingle multiple operations using arguments

This means that EclipseKeyword now never processes the data it
gets. Instead the data must be explicitly preprocessed by the calling
site using the new auxiliary functions "convertUnit()",
"extractFromStriped()", etc. This approach needs a few additional
temporary copies of the data, but given the facts that readability of
this code is much better using this approach, and that EclipseWriter
is neither a performance- nor a memory critical codepath, I don't care
too much about those temporary arrays...
EclipseWriter: add method variants taking the new instead of the old parser
endpoint scaling: hack around some unimplemented functionality in SatFuncSimple

at least i *think* it's unimplemented...
endpoint scaling: change default threephase_model to gwseg

and throw an exception if "simple" is encountered...
SimulatorTimer: allow it to be limited to a sub-range of all report steps