Added readme

README

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+wolframalpha
+============
+
+Python Client built against the `Wolfram|Alpha <http://wolframalpha.com>`_
+v2.0 API.
+
+Usage
+=====
+
+Basic usage is pretty simple. Create the client with your App ID (request from
+Wolfram Alpha)::
+
+    import wolframalpha
+    client = wolframalpha.Client(app_id)
+
+Then, you can send queries, which return Result objects::
+
+    res = client.query('temperature in Washington, DC on October 3, 2012')
+
+Result objects have `pods` attribute (a Pod is an answer from Wolfram Alpha).
+You may also query for simple the pods which have 'Result' titles::
+
+    print(res.results[0].text)
+
+For more information, read the source.