Merge branch 'add-authors'

AUTHORS.rst

@@ -50,6 +50,8 @@ bugs, provided ideas, etc; roughly in order of appearance):
 * Tim Caswell (https://github.com/creationix)
 * Mitchell Blank Jr (https://github.com/mitchblank)
 * https://github.com/yushli
+* Seo Sanghyeon (https://github.com/sanxiyn)
+* Han ChoongWoo (https://github.com/tunz)
 
 If you are accidentally missing from this list, send me an e-mail
 (``sami.vaarala@iki.fi``) and I'll fix the omission.