Purpose : Reads the step-file and evaluates statistic measures
           of the integrator steps.
 Usage   : rdsteps [-f -i -a -t -ver -h -?].

 Options : 
 -f FILE : the data is read from file FILE
           rather than from ./steps
           The string FILE may be a relative or full path-name.
 -i DIR  : data is stored in directory DIR
 -a tstrt: steps file is read only for times larger than tstrt
 -t tfin : steps file is read only up to time tfin
 -ver    : Version information about the program 
 -h      : Print this help text. 
 -?      : Print this help text.