Tokens aren't replaced

Please have a look at this patch.

Nice idea. I'll test it and if it will work correctly, happy to commit.

I'll try to update documentation for project, as it's a feature that is not that obvious.

@dshields,

Thank you for your patch. I merged your changes, and added small improvements (description include iinformation about tokens that may be used in field). Merged to 2.x branch, thanks again!