Update docs to 2.6.

Author: brittonsmith

doc/manual/source/conf.py

@@ -50,9 +50,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '2.5'
+version = '2.6'
 # The full version, including alpha/beta/rc tags.
-release = '2.5'
+release = '2.6'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.