Added missing credit line.

NEWS.md

@@ -103,6 +103,7 @@ The base and overlay canvas are now using the CSS classes "flot-base" and
 
  - Added a new option called 'zero' to bars and filled lines series, to control
    whether the y-axis minimum is scaled to fit the data or set to zero.
+   (patch by David Schnur, issues #316, #529, and #856, pull request #911)
 
  - The plot function is now also a jQuery chainable property.
    (patch by David Schnur, issues #734 and #816, pull request #953)