Added Introductory Docs

README.md

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+cromlech.sessions.jwt
+======
+
+
+This packaged provides HTTP server side sessions using JWT and Cookies.
+
+JWT is  way of encrypting a json file, so that it can be used for secure communications. 
+
+cromlech.sessions.jwt uses that encrypted information to keep a person logged in, even though HTTP is a stateless protocol. 
+
+In the old days, we used a session cookie to identify a person, and kept the critical information in the local database.  But this did not scale well.  What if the next request hit a different server?   What if you have a zope server and a chat server,  the login information would have to be transferred over. What if you have a micro services architecture?  So by encrypting the login credentials, and storing them in a cookie, along with time to live information everything works much better.
+
+You can read the detailed documentation [here](./src/cromlech/sessions/jwt/test_session.txt).   
+
+In general Cromlech has great detailed documentation, but it is all hidden in the 
+doc tests.  So always look for it there. 
+
+