Fix readme and bump version

Author: henriquebastos

README.rst

@@ -217,7 +217,7 @@ To override a config parameter you can simply do:
 
 
 How does it work?
-=============
+=================
 
 *Decouple* always searches for *Options* in this order:
 

setup.py

@@ -6,7 +6,7 @@
 README = os.path.join(os.path.dirname(__file__), 'README.rst')
 
 setup(name='python-decouple',
-      version='3.4',
+      version='3.5',
       description='Strict separation of settings from code.',
       long_description=open(README).read(),
       author="Henrique Bastos", author_email="[email protected]",