Document the chassis data model
Document the chassis data model

Like buildings, this data isn't currently used. However, it demonstrates a
more complicated data model than that for buildings, in that it has a link and
more than one YAML file.

saab-simc-admin/palletjack,notCalle/palletjack,creideiki/palletjack,saab-simc-admin/palletjack,creideiki/palletjack,notCalle/palletjack