If sigmaInit is relative (%), do not read vecSigmaInit. Otherwise
always use vecSigmaInit with default all values of sigmaInit.
* eoParser.h (eoParser::getORcreateParam): Make this a real if-then-else
clause around ptParam (found or not).
* eoParam.h (eoValueParam::setValue): Document.
(eoValueParam<std::vector<double> >::setValue): Allow delimiters ',' and
';'. A plain ' ' does not work, as it is not correctly read by
eoParser::readFrom.
