Prefix columns classes with `col-`
Use class based on column name for AttributesTable rows
Use `parameterize` to generate class from column name
Class default to .row and .col
.col class for every cell
.row class for every row
Merge pull request #2532 from TimPetricola/fix-columns-class

Row and cells classes based on column name (+ prefix)
update CONTRIBUTING.md
Add multi-record support to attributes_table_for
update 4-csv-format.md
fix typo in docs
Merge pull request #2544 from zorab47/multi-record-attributes-table-for

Add multi-record support to attributes_table_for
update the show page docs