Added doc string

Author: austinmh12

atlassian/jira.py

@@ -579,6 +579,13 @@ def get_custom_fields(self, search=None, start=1, limit=50):
         return self.get(url, params=params)
 
     def create_custom_field(self, name, type, search_key=None, description=None):
+        """
+        Creates a custom field with the given name and type
+        :param name: str
+        :param type: str, like 'com.atlassian.jira.plugin.system.customfieldtypes:textfield'
+        :param search_key: str, like above
+        :param description: str
+        """
         url = 'rest/api/2/field'
         data = {'name': name, 'type': type}
         if search_key: