wiggle : plot wiggle/VA/image plot
 
  Call
     wiggle(Data); % wiggle plot
     wiggle(Data,scale); % scaled wiggle plot
     wiggle(x,t,Data); % wiggle plt
     wiggle(x,t,Data,'VA') % variable Area (pos->black;neg->transp)
     wiggle(x,t,Data,'VA2') % variable Area (pos->black;neg->red)
     wiggle(x,t,Data,'wiggle',scale); % Scaled wiggle
     wiggle(x,t,Data,'wiggle',scale,showmax); % Scaled wiggle and max
                                                showmax traces.
     wiggle(x,t,Data,'wiggle',scale,showmax,plimage); % wiggle + image
     wiggle(x,t,Data,'wiggle',scale,showmax,plimage,caxis); % wiggle +
                                                              scaled image
 
  Data : [nt,ntraces]
  x : [1:ntraces] X axis (ex [SegyTraceheaders.offset])
  t : [1:nt] Y axis
  style : ['VA'] : Variable Area
          ['wiggle'] : Wiggle plot
  scale : scaling factor, can be left empty as []
  showmax [scalar] : max number of traces to show on display [def=100]
  plimage [0/1] : Show image beneath wiggles [def=0];
  caxis [min max]/[scalar] : amplitude range for colorscale