Refactor to make the is simpler to implement CSV column detection.
[AGP-5] Added ACs for grids index
[AGP-5] Added cucumber setup
[AGP-5]
Added: Cucumber step definitions for grids index (web) and code to satisfy /grids/ endoint
Added: run_tests.sh script
Incurred debt: code to fetch index is very basic and could do with a bit of IoC