bump version

Author: vvolkl

conf.py

@@ -61,9 +61,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = u'2.12'
+version = u'2.13'
 # The full version, including alpha/beta/rc tags.
-release = u'2.12.0-devel'
+release = u'2.13.0-devel'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.