Add code highlighting.

pygion.md

@@ -10,32 +10,40 @@ Pygion is task-based framework for Python based on the [Legion]({{ "/" | relativ
 
 For an overview of Pygion, the [original PAW-ATM paper]({{ "/pdfs/pygion2019.pdf" | relative_url }}).
 
+{% highlight python %}
+from pygion import task
+
+@task
+def main():
+    print("Hello, Legion!")
+{% endhighlight %}
+
 ## Getting Started
 
 Pygion lives in the main Legion repo under
 [`bindings/python`](https://github.com/StanfordLegion/legion/tree/stable/bindings/python). To
 get started with Pygion, build with Make in that directory:
 
-```
+{% highlight bash %}
 git clone https://github.com/StanfordLegion/legion.git
 cd legion/bindings/python
 make LG_RT_DIR=$PWD/../../runtime -j4
-```
+{% endhighlight %}
 
 Customize the `-j` flag parameter to control the number of threads used to build, depending on your machine.
 
 ## Building with CMake
 
 If you prefer to use CMake, then build Legion at the top level `-DLegion_BUILD_BINDINGS=ON -DLegion_USE_Python=ON`:
 
-```
+{% highlight bash %}
 git clone https://github.com/StanfordLegion/legion.git
 cd legion
 mkdir build
 cd build
 cmake .. -DLegion_BUILD_BINDINGS=ON -DLegion_USE_Python=ON -DCMAKE_INSTALL_PREFIX=$PWD/../install
 make install -j4
-```
+{% endhighlight %}
 
 ## Examples