Updated credits for the recent getSelection fix.

NEWS.md

@@ -89,10 +89,13 @@ The base and overlay canvas are now using the CSS classes "flot-base" and
    fixes by Julien Thomas, maimairel, and Lau Bech Lauritzen)
 
  - Added the ability to control pie shadow position and alpha via a new pie
-   'shadow' option. (patch by Julien Thomas)
+   'shadow' option. (patch by Julien Thomas, pull request #78)
 
  - Added the ability to set width and color for individual sides of the grid.
-   (patch by Ara Anjargolian)
+   (patch by Ara Anjargolian, pull request #855)
+
+ - The selection plugin's getSelection now returns null when the selection
+   has been cleared. (patch by Nick Campbell, pull request #852)
 
 ### Bug fixes ###