Domestic gas consumption (#279)

* Create gas

* Add files via upload

* Delete domestic-gas-consumption/gas

File created with new folder. Deleting as not needed

* Add files via upload

* Updated metadata following topic expert feedback

* Add files via upload

Changed measure and unit in csv file following topic expert feedback

---------

Co-authored-by: Ben <107995885+BenHowland@users.noreply.github.com>

Author: Charlee-H