[JS] Easy way to create a new Table with an additional column

[asfimport]

It should be easier to add a new column to a table. API could be either table.addColumn(vector) or table.merge(..tables or vectors)

Reporter: Brian Hulette / @TheNeuralBit
Assignee: Paul Taylor / @trxcllnt

_{Note: This issue was originally created as ARROW-2764. Please see the migration documentation for further details.}

[asfimport]

Brian Hulette / @TheNeuralBit:
Closed in #3634