Bump version to 6.4.

Author: anthony-tuininga

Diff for: doc/src/conf.py

@@ -40,9 +40,9 @@
 # other places throughout the built documents.
 #
 # The short X.Y version.
-version = '6.3'
+version = '6.4'
 # The full version, including alpha/beta/rc tags.
-release = '6.3.0'
+release = '6.4.0'
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:

Diff for: setup.py

@@ -20,7 +20,7 @@
     from distutils.extension import Extension
 
 # define build constants
-BUILD_VERSION = "6.3"
+BUILD_VERSION = "6.4"
 
 # setup extra link and compile args
 extraLinkArgs = []