Prepare release 0.5.3

Change-Id: I2c9ca578746cdbadebacaed10ad175923d31a5aa
diff --git a/wscript b/wscript
index c860fc8..cdd0470 100644
--- a/wscript
+++ b/wscript
@@ -3,7 +3,7 @@
 from waflib import Context, Logs, Utils
 import os, subprocess
 
-VERSION = '0.5.2'
+VERSION = '0.5.3'
 APPNAME = 'ChronoSync'
 GIT_TAG_PREFIX = ''