Update README.md

Author: benjhar

README.md

@@ -10,3 +10,11 @@ Just frickin
   print(joke)
 ```
 bam you got yourself a joke
+
+The `get_joke()` function has multiple optional parameters:
+`category` - a list of categories the joke should fit in. Possible entries are "Programming", "Miscellaneous" and "Dark". Leave blank for any.
+`blacklist` - a list of things you don't *really* want to see. Maybe you're babysitting. Possible entries are "nsfw", "religious", "political", "racist" and "sexist"
+`response_format` - a string which describes what format you want your response in. Default is json, and it will return a dict. Other options are "xml" and "yaml"
+`type` - what type of joke it is. Defaults to use either. Possible options are "single" and "twopart"
+`search_string` - string to search for in jokes. Defaults to None
+`id_range` - a list (which should only contain two items) which describes the range in which to search for jokes, by joke id.