[Breadcrumb]: Implement component.

[hallister]

Since breadcrumbs and a router go hand in hand, it's probably better to either port react-breadcrumbs or just use it and pass classes by hand.

[loris]

I added some props to react-breadcrumbs (see PR) a few weeks ago to make it compatible with Semantic UI markup. Now you can use it this way:

import React from 'react';
import { Icon } from 'semantic-react';
import Breadcrumbs from 'react-breadcrumbs';

const Breadcrumb = props =>
  <Breadcrumbs
    {...props}
    separator={<Icon name="right angle divider" />}
    wrapperClass="ui breadcrumb"
    itemClass="section"
    activeItemClass="active"
  />;

export default Breadcrumb;