Cleaned up includes on histograms.htm.
Adding converted versions of all files in /Java/Data. Note that some may be misconverted - they have not yet been checked for accuracy.
Fixed json for housing-1990 and p6-1990.
Converted HistHiLite.htm to sticigui-js
Converted ScatterPlot.htm histogram to sticigui-js
Converted histogramsj.htm histogram to sticigui-js
Converted location{i,j}.htm histogram to sticigui-js
Converted scatterplotsj.htm histogram to sticigui-js