Numerous improvements to SQL Lab (#1088)

* Improving the Visualize flow

* Fixed the timer

* CTAS

* Expiclit engine handling

* make tab full height, stretch for longer content (#1081)

* Better error handling for queries

* Hooked and fixed CSV export

* Linting

* Tying in the dttm in the viz flow

* Indicator showing when going offline

* Addressing comments, fixing the build

* Fixing unit tests

caravel/assets/javascripts/SqlLab/components/ResultSet.jsx

@@ -43,7 +43,7 @@ class ResultSet extends React.Component {
                 >
                   <i className="fa fa-line-chart m-l-1" /> Visualize
                 </Button>
-                <Button bsSize="small">
+                <Button bsSize="small" href={'/caravel/csv/' + this.props.query.id}>
                   <i className="fa fa-file-text-o" /> .CSV
                 </Button>
               </ButtonGroup>