Merge pull request nltk#3330 from WilliamPLaCroix/patch-1

Update AUTHORS.md

Author: stevenbird

AUTHORS.md

@@ -304,6 +304,7 @@
 - Ron Urbach <https://github.com/sharpblade4>
 - Vivek Kalyan <https://github.com/vivekkalyan>
 - Tom Strange https://github.com/strangetom
+- William LaCroix <https://github.com/WilliamPLaCroix>
 - Peter de Blanc <https://github.com/pdeblanc>
 
 ## Others whose work we've taken and included in NLTK, but who didn't directly contribute it: