Installation fixes (#6)

* Changed to work with installlatest script

* Removed unnecessary lines

Added aircraft reference data (#2)

* Added aircraft reference data

* added more recent hdb data to reflect column name changes

* Added aircraft data function

* Changed to only holding reference data in memory

* Update to include error message

Co-authored-by: Jonathon McMurray <jonathon.mcmurray@aquaq.co.uk>

Co-authored-by: Jonathon McMurray <jonathon.mcmurray@aquaq.co.uk>