remove server database reset
modify sync function call to async function call
modify to be extensible with datastore other than in-memory
bug fix: typo
remove cbHelper
bug fix: typo
seperate in-memory store from auth.js
hide challenge generation from auth.js
added abstract class UserStore
added empty RedisStore.js
Updated README.md
updated package.json
implemented RedisStore
updated README.md
Merge branch 'master' into auth_redis

Conflicts:
	README.md