Bump version to v0.15.2

Author: edschofield

src/future/__init__.py

@@ -88,7 +88,7 @@
 __copyright__ = 'Copyright 2013-2015 Python Charmers Pty Ltd'
 __ver_major__ = 0
 __ver_minor__ = 15
-__ver_patch__ = 1
+__ver_patch__ = 2
 __ver_sub__ = ''
 __version__ = "%d.%d.%d%s" % (__ver_major__, __ver_minor__,
                               __ver_patch__, __ver_sub__)