Create Assignment component w/ docs

src/components/Assignment/Assignment.js

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+import React from "react";
+import PropTypes from "prop-types";
+import { Typography } from "@material-ui/core";
+import RelativeTime from "react-relative-time";
+
+export default function Assignment({ by, to, datetime }){
+	return (
+		<Typography>
+			<b>{by}</b> assigned this to <b>{to}</b> <RelativeTime value={new Date(datetime)} />
+		</Typography>
+	);
+}
+
+Assignment.propTypes = {
+	/** The person who changed the assignment. */
+	"by": PropTypes.string.isRequired,
+	/** The person the item was assigned to. */
+	"to": PropTypes.string.isRequired,
+	/** The time the assignment was changed in ISO 8601 format. */
+	"datetime": PropTypes.string.isRequired
+}

src/components/Assignment/Assignment.md

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+Renders a string representation of an assignment with a relative time.
+
+```jsx
+import Assignment from "./Assignment";
+
+const example_assignment = {
+	"type": "assignment",
+	"datetime": "2020-06-23T13:27:00-0400",
+	"by": "campb303",
+	"to": "campb303"
+};
+
+<Assignment {...example_assignment} />
+
+```
+
+```jsx static
+const example_assignment = {
+	"type": "assignment",
+	"datetime": "2020-06-23T13:27:00-0400",
+	"by": "campb303",
+	"to": "campb303"
+};
+
+<Assignment {...example_assignment} />
+```

src/components/Assignment/index.js

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+export { default } from "./Assignment";