unity tables now have a rank attribute which is just the unique value that all cells have. Because of this, a unity table can now be multiplied with a scalar. And regular sparta tables can be multiplied with unities of different rank. As a consequence, unities can now be marginalized also.

New function

`equiv`

to test if two sparta objects are identicalFixed a bug when assigning dimnames to the result of multiplication

- marginalization is now faster due to some refactoring

- Prevent print from printing dimension names
- A bug, due to wrong sorting, that manifested in both
`marg`

,`slice`

,`mult`

and`div`

has been fixed. These functions were prone to errors when the number of variables exceed`10`

. - It is now possible to multiply and divide sparta tables with a scalar where the scalar can be either of the two inputs. Prior to v0.6.0 the scalar had to be the second argument.

- First release