same_str_as: Create time.table from a template
In rossklin/timetablr: Representation and basic operation for multiple time series.

Turns a data.table into a time table using attributes from another time.table.

1 2	same_str_as(dt, tt, add.index = c(), add.measurement = c(), add.auxiliary = c())

`dt`	data.table containing data
`tt`	time.table to use as template
`add.index`	new index columns present in dt
`add.measurement`	new measurement columns present in dt
`add.auxiliary`	new auxiliary columns present in dt Note that all columns in `tt` must be present in `dt` and that any columns in `dt` not in `tt` are lost.