SQL Lab - A multi-tab SQL editor (#514)

* Carapal react mockup

This is really just a mock up written in React to try different
components. It could become scaffolding to build a prototype, or not.

* Merging in Alanna's theme tweaks for SQL lab

* Tweak the display of the alert message in navbar

* Sketching the middleware refresh for Queries

* Adjustments

* Implement timer sync.

* CTAS

* Refactor the queries to be stored as a dict. (#994)

* Download csv endpoint. (#992)

* CSV download engdpoint.

* Use lower case booleans.

* Replcate loop with the object lookup by key.

* First changes for the sync

* Address comments

* Fix query deletions. Update only the queries from the store.

* Sync queries using tmp_id.

* simplify

* Fix the tests in the carapal. (#1023)

* Sync queries using tmp_id.

* Fix the unit tests

* Bux fixes. Pass 2.

* Tweakin' & linting

* Adding alpha label to the SQL LAb navbar entry

* Fixing the python unit tests

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

@@ -0,0 +1,54 @@
+import React from 'react';
+import { OverlayTrigger, Tooltip } from 'react-bootstrap';
+
+
+class Link extends React.Component {
+  render() {
+    let tooltip = (
+      <Tooltip id="tooltip">
+        {this.props.tooltip}
+      </Tooltip>
+    );
+    const link = (
+      <a
+        href={this.props.href}
+        onClick={this.props.onClick}
+        style={this.props.style}
+        className={'Link ' + this.props.className}
+      >
+          {this.props.children}
+      </a>
+    );
+    if (this.props.tooltip) {
+      return (
+        <OverlayTrigger
+          overlay={tooltip}
+          placement={this.props.placement}
+          delayShow={300}
+          delayHide={150}
+        >
+          {link}
+        </OverlayTrigger>
+      );
+    }
+    return link;
+  }
+}
+Link.propTypes = {
+  children: React.PropTypes.object,
+  className: React.PropTypes.string,
+  href: React.PropTypes.string,
+  onClick: React.PropTypes.func,
+  placement: React.PropTypes.string,
+  style: React.PropTypes.object,
+  tooltip: React.PropTypes.string,
+};
+Link.defaultProps = {
+  disabled: false,
+  href: '#',
+  tooltip: null,
+  placement: 'top',
+  onClick: () => {},
+};
+
+export default Link;