Prepare 0.23 release

CHANGES.txt

@@ -1,4 +1,4 @@
-0.23-dev (Next Release)
+0.23 (2015-02-10)
 
  - Added a workaround to $F001 output to catch encoding errors and
    display a "?" instead of crashing.  This condition can occur if

docs/conf.py

@@ -51,7 +51,7 @@ copyright = u'2008-%d, Mike Naberezny and contributors' % year
 # built documents.
 #
 # The short X.Y version.
-version = '0.23-dev'
+version = '0.23'
 # The full version, including alpha/beta/rc tags.
 release = version
 

setup.py

@@ -1,4 +1,4 @@
-__version__ = '0.23-dev'
+__version__ = '0.23'
 
 import os
 import sys