adding configurable secret key option, readme, and test
removing the mutable/global state issue by having token.create return token/validate method
fixing private variable underscore naming
adding express deps and mock
debug middle step. remove console log
adding debug console stmt
another debug stmt
some debug stmts
adding error condition if req.session is not available at time of token creation
adding req.session not available error handling
adding stuffs
fix unit tests to work with both session and cookie-session
updating tests to fix any deprecation warnings, updating README
fix formatting per PR comment, remove commented unused variable secretKey
Merge pull request #38 from grawk/express-upgrade

upgrade unit tests for express 4.x