Add Row and Col components

[wagnermoschini]

this PR is inspired on @chromakode feedback on pr #21

//example of proposal
<Row>
  <Col>{...}</Col>
  <Col>{...}</Col>
</Row>

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[singingwolfboy]

@chromakode Any feedback on this? This pull request has been open for several months, and it looks really handy. Is it ready to be merged into master and released? If not, is there anything I can do to help make it ready?

[robinknox]

Likewise, I'd really like to see this functionality added since I need multi-column support for my emails.

[chromaci]

Thanks all for your thoughts in this thread. I'm presently traveling and will look into this over the weekend.

…

[searls]

+1 to taking a look at merging this. I think I'm going to probably work off a fork to get these two components since it seems necessary to do a 2-column layout

[giulioambrogi]

Any update on this?

[kopax]

Hi, any update on this? @chromaci vacation still?