Formatting features

1.  \null [string] - Show or set NULL representation
2.  \f [string] Show or set field separator
3.  \t [on|off] Toggle or set tuple only output
4.  \a [on|off] Toggle or set aligned output
5.  rightmost column is no longer padded
Tests added and updated

This is the instance where expanded and tupleOutput are set so rows are seperated by - instead of |