Swap Python logo to use SVG version

Author: StanFromIreland

speed_python/static/images/logo.png

@@ -1,3 +1,8 @@
 {% extends "codespeed/base.html" %}
+{% load static %}
 
 {% block title %}Python Speed Center{% endblock %}
+
+{% block logo %}
+  <img src="{% static 'images/python-logo.svg' %}" height="40" alt="Python"/>
+{% endblock logo %}