Merge pull request #24 from robhawkins/master

changed `_thing_prefix['Link']='t3_'` to `_thing_prefix['Submission']…

psaw/PushshiftAPI.py

@@ -49,7 +49,7 @@ class PushshiftAPIMinimal(object):
     _thing_prefix = {
         	'Comment':'t1_',
         	'Account':'t2_',
-        	'Link':'t3_',
+        	'Submission':'t3_',
         	'Message':'t4_',
         	'Subreddit':'t5_',
         	'Award':'t6_'