Energy futures (CL, HO, RB, NG) expire in the month before the contract month.
To handle these properly, the following changes have been implemented:
- the AlgoSeekFuturesReader has been updated to create the future symbol with the correct expiry date
- the zip entry names in futures data files now contain the full expiry date (in addition to the contract month)
- the sample data files have been updated to use the new zip entry names
- new unit tests have been added and existing ones updated