数据层框架（baas、sync、datastore）整理

## parse

https://parse.com/
## dropbox Datastore API (A-C2S)

https://www.dropbox.com/developers-v1/datastore/docs/js
## firebase

https://www.firebase.com/
## meteor minimongo + ddp

https://www.meteor.com/full-stack-db-drivers
## js-data

http://www.js-data.io
## ember-data
## deployd

http://deployd.com/
## gunjs （A-P2P）

https://github.com/6174/gun
## relay + graphql
## pouchdb

https://github.com/pouchdb/pouchdb
## amazon-cognito-js

https://github.com/aws/amazon-cognito-js

@todo: 详情