[feature-request] Table footer <tfoot> support

[mattez]

Hi. It might work like this:

| First Header  | Second Header |
| ------------- | ------------- |
| Content Cell  | Content Cell  |
| Content Cell  | Content Cell  |
| ----------------------------- |
| Footer content                |

What do you think?

[michelf]

Are you implicitly requesting a "rowspan" feature too? Otherwise it'd look like this:

| First Header   | Second Header |
| -------------- | ------------- |
| Content Cell   | Content Cell  |
| Content Cell   | Content Cell  |
| -------------- | ------------- |
| Footer content | more content  |

[mattez]

Hello Mr. @michelf, I`m MARKDOWN fan and user only. I expect this behavior intuitively. It might work, isn't it?