#97: Add __version__ and __spec__

* Enable support for toml.__version__

* Add __spec__

Include reference to which version of the specification this library currently implements.
https://github.com/toml-lang/toml/blob/v0.4.0/README.md

setup.py

@@ -1,9 +1,10 @@
+import toml
 from distutils.core import setup
 
 with open("README.rst") as readmefile:
     readme = readmefile.read()
 setup(name='toml',
-      version='0.9.2',
+      version=toml.__version__,
       description="Python Library for Tom's Obvious, Minimal Language",
       author="Uiri Noyb",
       author_email="uiri@xqz.ca",

toml.py

@@ -4,6 +4,9 @@ import re
 import datetime
 import io
 
+__version__ = "0.9.2"
+__spec__ = "0.4.0"
+
 class TomlDecodeError(Exception):
     pass