ADT.Table is a generic module for manipulating tables.
Each table contains one or several columns.
Each column is associated with a name, the column name.
Optionally, one can provide a column type. The Table module can do a number
of operations on a given table, like computing the sum of a column,
grouping, sorting etc.
All column references are case insensitive. A column can be referred to by
its position (starting from zero). All operations are non-destructive. That
means that a new table object will be returned after, for example, a sort.
ADT.Relation.Binary()->remove()