Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 bot_register(Arg1, Arg2, Arg3)

 bot_register(Arg1, Arg2, Arg3, Arg4)

 bot_get(Arg1, Arg2, Arg3)

 bot_get(Arg1, Arg2, Arg3, Arg4)

 chat_add(Arg1, Arg2, Arg3)

 chat_add(Arg1, Arg2, Arg3, Arg4)

 chat_get(Arg1, Arg2, Arg3)

 chat_get(Arg1, Arg2, Arg3, Arg4)

 chat_user_add(Arg1, Arg2, Arg3)

 chat_user_add(Arg1, Arg2, Arg3, Arg4)

 chat_message_send(Arg1, Arg2, Arg3)

 chat_message_send(Arg1, Arg2, Arg3, Arg4)

 file_upload(Arg1, Arg2, Arg3)

 file_upload(Arg1, Arg2, Arg3, Arg4)