Add symlink to gnuplot's js library.
Use gnuplot's native svg terminal.
Supply grid.png used in gnuplot's svg files.
Enabled enhanced svg terminal mode.
Drop x axis time stuff when rendering a histogram.
Allow inside legend.
Add basic correlation support.
Add 'heatmap' presentation.
Fix row selection validation.
Render correlation as bitmap (svg produces heavy load on the client). Fix correlation scaling & labeling.
Add graph titles.