Documentation errors

[GrahamMcLeod]

Hi
There are a couple of errors with the main page documentation:
a) The add column example uses the keyword "row:"
b) The add: item example does not work as the method does not exist
BTW, I think this is a great contribution!
Regards,
Graham

[olekscode]

Thanks again!
All these errors were fixed and the tutorial was updated.
Let me know what you think about it