Improved performance test notes formatting

performance_tests.rst

@@ -5,26 +5,29 @@ Launch the performance test with::
     cd tests
     django test --keepdb django_restframework_gis_tests.test_performance
 
+For more information regarding how the measurement is performed read the code in
+`test_performance.py <https://github.com/djangonauts/django-rest-framework-gis/blob/master/tests/django_restframework_gis_tests/test_performance.py>`__.
+
 0.9.2
 =====
 
-py2: 6.304474401472
-py3: 6.952443096001661
+- **py2**: 6.304474401472
+- **py3**: 6.952443096001661
 
 0.9.3
 =====
 
-py2: 4.462462759018 (**29.2%** improvement)
-py3: 5.217188624000118 (**25% improvement)
+- **py2**: 4.462462759018 (**29.2%** improvement)
+- **py3**: 5.217188624000118 (**25% improvement)
 
 0.9.4
 =====
 
-py2: 4.227859210966
-py3: 5.00467809599977
+- **py2**: 4.227859210966
+- **py3**: 5.00467809599977
 
 0.9.5
 =====
 
-py2: 4.193417596816
-py3: 4.89978777600045
+- **py2**: 4.193417596816
+- **py3**: 4.89978777600045