hw6 first commit

hw6/bower_components/d3-tip/README.md

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+# d3.tip: Tooltips for d3.js visualizations
+
+[![](https://github-images.s3.amazonaws.com/skitch/Screen_Shot_2013-04-08_at_11.40.10_AM-20130408-114054.png)](http://bl.ocks.org/Caged/6476579)
+
+* [See a live demo](http://bl.ocks.org/Caged/6476579)
+* [Example code](/examples)
+
+### API Docs
+See the [API Documentation](docs/index.md)
+
+### Download Latest Version
+* [Development Version](https://raw.github.com/Caged/d3-tip/master/index.js) : **6kb** / **~2kb gzipped**
+
+### Install with NPM
+```
+npm install d3-tip
+```
+
+### Quick Usage
+```javascript
+/* Initialize tooltip */
+tip = d3.tip().attr('class', 'd3-tip').html(function(d) { return d; });
+
+/* Invoke the tip in the context of your visualization */
+vis.call(tip)
+
+vis.selectAll('rect')
+  .data(data)
+  .enter()
+  .append('rect')
+  .attr('width', function() { return x.rangeBand() })
+  .attr('height', function(d) { return h - y(d) })
+  .attr('y', function(d) { return y(d) })
+  .attr('x', function(d, i) { return x(i) })
+  .on('mouseover', tip.show)
+  .on('mouseout', tip.hide)
+```
+
+If you want basic styling, you can include `example-styles.css` using a service like
+rawgithub.com.
+
+```html
+<link rel="stylesheet" href="//rawgithub.com/Caged/d3-tip/master/examples/example-styles.css">
+```