[WiP] rename project from Caravel to Superset (#1576)

* Change in files

* Renamin files and folders

* cleaning up a single piece of lint

* Removing boat picture from docs

* add superset word mark

* Update rename note in docs

* Fixing images

* Pinning datatables

* Fixing issues with mapbox-gl

* Forgot to rename one file

* Linting

* v0.13.0

* adding pyyaml to dev-reqs

superset/assets/visualizations/word_cloud.js

@@ -0,0 +1,77 @@
+/* eslint-disable  no-use-before-define */
+import d3 from 'd3';
+import cloudLayout from 'd3-cloud';
+import { category21 } from '../javascripts/modules/colors';
+
+function wordCloudChart(slice) {
+  const chart = d3.select(slice.selector);
+
+  function refresh() {
+    d3.json(slice.jsonEndpoint(), function (error, json) {
+      if (error !== null) {
+        slice.error(error.responseText, error);
+        return;
+      }
+      const data = json.data;
+      const range = [
+        json.form_data.size_from,
+        json.form_data.size_to,
+      ];
+      const rotation = json.form_data.rotation;
+      let fRotation;
+      if (rotation === 'square') {
+        fRotation = () => ~~(Math.random() * 2) * 90;
+      } else if (rotation === 'flat') {
+        fRotation = () => 0;
+      } else {
+        fRotation = () => (~~(Math.random() * 6) - 3) * 30;
+      }
+      const size = [slice.width(), slice.height()];
+
+      const scale = d3.scale.linear()
+      .range(range)
+      .domain(d3.extent(data, function (d) {
+        return d.size;
+      }));
+
+      function draw(words) {
+        chart.selectAll('*').remove();
+
+        chart.append('svg')
+        .attr('width', layout.size()[0])
+        .attr('height', layout.size()[1])
+        .append('g')
+        .attr('transform', `translate(${layout.size()[0] / 2},${layout.size()[1] / 2})`)
+        .selectAll('text')
+        .data(words)
+        .enter()
+        .append('text')
+        .style('font-size', (d) => d.size + 'px')
+        .style('font-family', 'Impact')
+        .style('fill', (d) => category21(d.text))
+        .attr('text-anchor', 'middle')
+        .attr('transform', (d) => `translate(${d.x}, ${d.y}) rotate(${d.rotate})`)
+        .text((d) => d.text);
+      }
+
+      const layout = cloudLayout()
+      .size(size)
+      .words(data)
+      .padding(5)
+      .rotate(fRotation)
+      .font('serif')
+      .fontSize((d) => scale(d.size))
+      .on('end', draw);
+
+      layout.start();
+      slice.done(json);
+    });
+  }
+
+  return {
+    render: refresh,
+    resize: refresh,
+  };
+}
+
+module.exports = wordCloudChart;