Update readme

Author: hypirion

README.md

@@ -1,12 +1,38 @@
 # clj-xchart
 
-Clojure wrapper around XChart.
+Clojure wrapper around XChart, a small library for rendering charts/plots.
+
+![Rosling chart](rosling.png)
+
+This is the latest released version
+([API docs](https://hypirion.github.io/clj-xchart/api/0.2.0/en/)):
+
+```clj
+[com.hypirion/clj-xchart "0.2.0"]
+```
+
+## What
+
+clj-xchart wraps all the different chart you can generate in XChart:
+
+* Line charts
+* Scatter charts
+* Area charts
+* Bar charts
+* Histogram charts
+* Pie charts
+* Donut charts
+* Bubble charts
+* Stick charts
 
 ## Usage
 
-It is probably wise to wait until the documentation for this thing has been
-written. The library itself should be fully working, but it's a bit rough around
-the edges without the documentation.
+There are a lot of examples on the
+[examples page](https://hypirion.github.io/clj-xchart/examples), and
+[the tutorial](docs/tutorial.md) should basic usage. For more advanced
+customisation, have a look at the [render options](docs/render-options.md) page.
+
+The API is available at <https://hypirion.github.io/clj-xchart/api/0.2.0/en/>.
 
 ## License