Standardize chip height (#213)

* make all chips the same size

* create DetailList, Detail components; clean up Chips, ChipGroup

* delete BasicChip in favor of <Chip isReadOnly>

* create our own ChipGroup to handle overflow

src/components/VerticalSeparator/VerticalSeparator.jsx

@@ -1,18 +1,19 @@
 import React from 'react';
+import styled from 'styled-components';
+
+const Separator = styled.span`
+  display: inline-block;
+  width: 1px;
+  height: 30px;
+  margin-right: 20px;
+  margin-left: 20px;
+  background-color: #d7d7d7;
+  vertical-align: middle;
+`;
 
 const VerticalSeparator = () => (
   <div>
-    <span style={{
-      content: '',
-      backgroundColor: '#d7d7d7',
-      width: '1px',
-      height: '30px',
-      display: 'inline-block',
-      verticalAlign: 'middle',
-      marginLeft: '20px',
-      marginRight: '20px'
-    }}
-    />
+    <Separator />
   </div>
 );