id and author id of "messages" are saved as integers which can cause rounding errors, whereas the ids for users in the "users" section are strings.

ID and Author IDs of messages are stored as Integers, whereas in the "entities" section of each json export, the users are listed with ids in string format. I believe these should all be in string format, as I encountered rounding errors where IDs in the "messages" section were Integers rather than strings.
