adding some markdown markup

README.md

@@ -88,15 +88,17 @@ Requirements
 Installation
 -------------
 
- $ pip install python-dateutil jinja2 html5lib
- $ python setup.py install
+`$ pip install python-dateutil jinja2 html5lib`
+`$ python setup.py install`
 
 Example
 ---------------
+```
+$ mkdir mydump
+$ cd myddump
+$ etherdump init
 
- $ mkdir mydump
- $ cd myddump
- $ etherdump init
+```
 
 The program then interactively asks some questions: