#11 add the ability to give a limited to [Sequence] subtype

[koy]

Hello!

Tkanks for this program.
The tool is very convenient for generating the big data.

Would you add the ability to give a limited to [Sequence] subtype.

ex:
NO SUBNO
1 1
1 2
1 3
2 1
2 2
2 3
3 1
3 2
3 3

It will be very userd for a parent/child relationship data table.

Thank you very much !

[Ryan]

This feature has been added in v0.2.4 :)