[1.12.12] Release readiness

- Updated version and date in README
- Updated VERSION constant in Zend_Version

README.md

@@ -7,8 +7,8 @@ Master: [![Build Status](https://api.travis-ci.org/zendframework/zf1.png?branch=
 RELEASE INFORMATION
 ===================
 
-Zend Framework 1.12.12dev Release.
-Released on MMMMMMMM DD, YYYY.
+Zend Framework 1.12.12 Release.
+Released on May 19, 2015.
 
 IMPORTANT FIXES FOR 1.12.12
 ---------------------------

library/Zend/Version.php

@@ -32,7 +32,7 @@ final class Zend_Version
     /**
      * Zend Framework version identification - see compareVersion()
      */
-    const VERSION = '1.12.12dev';
+    const VERSION = '1.12.12';
 
     /**
      * The latest stable version Zend Framework available