prepare 0.5.3 release

ChangeLog

+python-nbxmpp 0.5.3 (13 July 2015)
+
+  * Fix receiving long utf8 strings under py3
+  * Fix issue with pyopenssl 0.15.1
+  * Fix decoding issues
+
 python-nbxmpp 0.5.2 (27 December 2014)
 
   * Fix BOSH HTTP requests

nbxmpp/__init__.py

@@ -17,4 +17,4 @@ from .client_nb import NonBlockingClient
 from .plugin import PlugIn
 from .smacks import Smacks
 
-__version__ = "0.5.2"
+__version__ = "0.5.3"

setup.py

@@ -3,7 +3,7 @@
 from distutils.core import setup
 
 setup(name='nbxmpp',
-      version='0.5.2',
+      version='0.5.3',
       description='Non blocking Jabber/XMPP module',
       author='Yann Leboulanger',
       author_email='asterix@lagaule.org',