5.5.9-SNAPSHOT -> 5.5.9

Author: pavel-alay

src/core/iTextSharp/text/Version.cs

@@ -75,7 +75,7 @@ public sealed class Version {
 	     * This String contains the version number of this iText release.
 	     * For debugging purposes, we request you NOT to change this constant.
 	     */
-        static private String release = "5.5.9-SNAPSHOT";
+        static private String release = "5.5.9";
 
 	    /**
 	     * This String contains the iText version as shown in the producer line.