Clayton branch

when-is-best - clayton-branch
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whenisgood, now with very basic session-tracking capabilities. Now a session is created for every new user and stored in the database, and a cookie is used by the browser to connect with the session. When users create an event after pressing the "Send to Back-End" button in the `/create_event` route, an event is stored in their session.

## How do I see what you did?

After adding several events using the Send to Back-End button on the `/create_event` route, change the route to `/history` and you will hopefully see a list of the events you created. Close out and start it up again. Now try it in a new browser and they should be gone.