Upgrade pip from 1.5.3 to 1.5.4
diff --git a/Lib/ensurepip/__init__.py b/Lib/ensurepip/__init__.py
index d495b50..f584bdc 100644
--- a/Lib/ensurepip/__init__.py
+++ b/Lib/ensurepip/__init__.py
@@ -10,7 +10,7 @@
 
 _SETUPTOOLS_VERSION = "2.1"
 
-_PIP_VERSION = "1.5.3"
+_PIP_VERSION = "1.5.4"
 
 # pip currently requires ssl support, so we try to provide a nicer
 # error message when that is missing (http://bugs.python.org/issue19744)