Add 1s data to DispatchPrice

[Starstrike99]

Could you please add the new columns "RAISE1SECRRP" and "LOWER1SECRRP" to DispatchPrice, to allow download of 1s FCAS prices?

[nick-gorman]

Good idea. Until I get around to it there is also this workaround as an option:
https://github.com/UNSW-CEEM/NEMOSIS#accessing-additional-table-columns