USAGE:    
           stats-of-merged Directives [option]
 
 PURPOSE:
           Assemble project statistics concerning
           *  Averages
           *  Skewness
           *  Median-Average
           *  Histograms
           on a by-project basis using the
           merged weighted residual file
 
 DIRECTIVES:
   D     - prepare data
   H     - prepare histogram data
   P     - plot skewness and median-mean
   Ph    - plot histogram instead.
           (Two calls are needed to plot both)
 
 OPTION:
 
  -uniform  - assume that residual is NOT modified by campaign-RMS.
 
 FILES:
 
  o/scg-cal-merged$VAR$DVAR.wr.ts
            - INPUT: weighted residual, eventually
              modified for mean RMS in campaign.
 
  t/urtap-merged$VAR.dw.ts
            - INPUT: weights, not modified
              by campaign RMS.
 
  campaign.weights
            - INPUT: if exists, use these weights
              to recalculate residual in nm/s^2
 
  stats-of-merged.rsl  
            - OUTPUT (tslist/tsfedit): Results

  tmp/camp-strip.txt
            - I/O: The strip of campaign names and
              instruments, placed on the right side
              of the diagram.
              Remove this file in order to
              create a new one.
 
  stats-of-merged.png in ~/www/4me/ag-superc/ - PLOT
  prj-histograms.png                          - PLOT
 
 ENVIRONMENT:
  VAR 
  DVAR