Update for v0.5.13 release.

Author: cherba

setup.py

@@ -53,7 +53,7 @@
 if py_version < '2.7':
     REQUIRED_PACKAGES.append('argparse>=1.2.1')
 
-_APITOOLS_VERSION = '0.5.12'
+_APITOOLS_VERSION = '0.5.13'
 
 with open('README.rst') as fileobj:
     README = fileobj.read()