Bar graph added.

node_modules/vega-encode/index.js

@@ -0,0 +1,9 @@
+export {default as axisticks} from './src/AxisTicks';
+export {default as datajoin} from './src/DataJoin';
+export {default as encode} from './src/Encode';
+export {default as legendentries} from './src/LegendEntries';
+export {default as linkpath} from './src/LinkPath';
+export {default as pie} from './src/Pie';
+export {default as scale} from './src/Scale';
+export {default as sortitems} from './src/SortItems';
+export {default as stack} from './src/Stack';