update README

README.md

@@ -54,6 +54,20 @@ with vcr.use_cassette('fixtures/vcr_cassettes/synopsis.yaml') as cass:
     assert cass.requests.keys()[0].host == 'zombo.com'
 ```
 
+The Cassette object exposes the following properties which I consider
+part of the API.  The fields are as follows:
+
+* requests: A list of vcr.Request objects containing the requests made
+  while this cassette was being used, ordered by the order that the
+  request was made.
+* responses: A list of the responses made.
+* play_count: The number of times this cassette has had a response
+  played back
+* play_counts: A collections.Counter showing the number of times each
+  response has been played back, indexed by the request
+* response_of(request): Access the response for a given request.
+
+
 
 ##Installation
 
@@ -69,9 +83,10 @@ This library is a work in progress, so the API might change on you.
 There are probably some [bugs](https://github.com/kevin1024/vcrpy/issues?labels=bug&page=1&state=open) floating around too.
 
 ##Changelog
-* 0.1.0: *backwards incompatible release - delete your old cassette
-  files*:  This release adds the ability to access the cassette to make
-assertions on it, as well as a major code refactor thanks to @dlecocq
+* 0.1.0: *backwards incompatible release - delete your old cassette files*:  
+  This release adds the ability to access the cassette to make assertions 
+  on it, as well as a major code refactor thanks to @dlecocq.  It also
+  fixes a couple longstanding bugs with redirects and HTTPS.
 * 0.0.4: If you have libyaml installed, vcrpy will use the c bindings
   instead.  Speed up your tests!  Thanks @dlecocq
 * 0.0.3: Add support for requests 1.2.3.  Support for older versions of requests dropped (thanks @vitormazzi and @bryanhelmig)