chore: Update README.md and set ver for next release

Author: jrconlin

README.md

@@ -3,6 +3,9 @@
 # Webpush Data encryption library for Python
 
 This is a work in progress.
+This library is available on [pypi as
+pywebpush](https://pypi.python.org/pypi/pywebpush).
+Source is available on [github](https://github.com/jrconlin/pywebpush)
 
 ## Installation
 

setup.py

@@ -3,7 +3,7 @@
 
 from setuptools import find_packages, setup
 
-__version__ = "0.4.0"
+__version__ = "0.5.0"
 
 
 def read_from(file):