adding basics for walkmanager_1

- the bare app, nothing else
- updated instructions somewhat for what I plan to do with this new app
(perhaps the instructions could be in a better spot?)
added socket.io as a dependency
added auth

‘geddy gen auth’
didn’t configure my secrets file yet, since it’s a bit early for
Facebook/Twitter/other integration.
changed data store to sqlite

also don’t include .db flies
added 'walk'

specifies pet names, walker name, timeDone, numerOfPets and notes
require user authentication to look at walks