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 Javascript Definition:
 
 Overview:
 A planck-HFI reqirement is that kst support scripting to allow flexable
 generation of complex plots.  We plan to use JavaScript as excellent 
 facilities for this exist within KDE.
 
 Requirements:
 - Complete bindings to all objects
         - everything that can be done in a .kst file can be done with a
           javascript
 - DCOP based commandline tool with konsole
         - will provide a 'command line' to kst (like sm or idl)
         - Can be commanded from either an embedded konsole, or an external
           konsole.
 - Multiple ways of entering scripts
         - from command line when starting kst
                 eg: kst -J "file=\"data.dat\";field=\"N15C2\"" bolo.js
         - From file menue
         - From DCOP/command line tool.
 - We will not use automatic bindings.  Instead, we will "ideal" bindings
   and implement them as internal calls to our internal objects
 - The update thread doesn't run if the interpreter is running, and blocks the
   interpreter from starting up during an update There will be a force
   update/repaint mechanism to allow updates during script interpretation.
 - vectors can be referenced as strings (tagname) everywhere too
 
 
 Open Questions:
 - kjsembed or qsa?
 
 
 Examples:
 A plot with points + error bars, and a line fit.
 The X axis vector has to be re-scaled.
 
 var f = new DataSource("Data.dat");
 if (!f) {
         alert("error");
 }
 
 var Vx = new DataVector(f, "1");
 string Vn = (new DataVector(f, "2", start, end)).tagName();
 var Vp = new DataVector(f, "3", start, end, skip);
 var Vm = new DataVector(f, "4", start, end, skip, ave);
 
 // After here is unimplemented so far
 var Ex = Equation("[" + Vx.tag + "] * 0.0042", Vx);
 
 var C = Curve(Ex.sv, Vn);
 C.hasPoint = true;
 C.hasLines = false;
 C.setYError(Vp, Vm);
 C.setPointType(6);.
 
 var lfit = fit("kstfit_linear_unweighted", Ex.sv, Vn);
 
 var Cf = Curve(Ex.sv, lfit.Y_Fitted);
 
 var P = Plot();
 
 P.addCurve(C);  // ordering etc.............  P.curves.append() etc?
 P.addCurve(Cf);
 
 P.xLabel.text = "x axis";
 P.yLabel.text = "y axis";
 
 L = PlotLabel(lfit.parameterstring);
 L.setPos(0.2, 0.8);
 P.addLabel(L);
 
 Window().addPlot(P);