fixed two issues in jit builder: a) respect environment variable (instead of c++); b) casting integer variables to doubles when evaluating label expressions to avoid integer division
STORM_LOG_THROW(argumentCache.size()<=option->getArgumentCount(),storm::exceptions::OptionParserException,"Too many arguments for option '"<<optionName<<"'.");
STORM_LOG_THROW(!option->getHasOptionBeenSet(),storm::exceptions::OptionParserException,"Option '"<<optionName<<"' is set multiple times.");
// Now set the provided argument values one by one.