Several warnings on Attached Layout

[arimourao]

I just installed semantic-ui-react to do some tests and maybe implement in an ongoing project. Right off the bat I get plenty of warnings just copying and pasting the sample code given in "attached content" layout section. It seems to work ok, but here are some of the warnings:

Warning: Failed prop type: Invalid prop attachedsupplied toMessage.

Warning: Unknown prop verticalAllign on <table> tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop

Warning: validateDOMNesting(...): <th> cannot appear as a child of <thead>. See AdminPanel > TableHeader > thead > TableHeaderCell > TableCell > th.

Warning: Unknown prop verticalAllign on <table> tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop

[layershifter]

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[levithomason]

We've misspelled verticalAllign in the example. Align should not have 2 Ls. I wonder why we aren't seeing these prop warnings locally though?

[levithomason]

We also have <Message attached='top' /> in the example, but the prop type is:

    attached: PropTypes.oneOfType([
      PropTypes.bool,
      PropTypes.oneOf(['bottom']),
    ]),

We should arguably accept top as a valid value for symmetry.