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

__tests__/components/Lookup.test.jsx

@@ -141,7 +141,7 @@ describe('<Lookup />', () => {
         sortedColumnKey="name"
       />
     ).find('Lookup');
-    const chip = wrapper.find('li.pf-c-chip');
+    const chip = wrapper.find('.pf-c-chip');
     expect(chip).toHaveLength(2);
   });