Sessions now handled by Redis

This update moves sessions from memory to redis.  Session expiration is set at 1 hour.   Before merging this change in make sure you have redis and can run it on your machine.  The port should be 6379.   Merge the changes in and run npm install to install connect-redis @ 1.4.6 (the newest version won't work with this configuration).  Now run npm start, the server should run but should use Redis for sessions now.