Add multiget and a hydrate-store-HOC

[raubas]

THIS LIB IS AWESOME!

With that said, I'm missing multi get and better handling of JSON.parse/stringify, have done som work on my fork https://github.com/raubas/react-native-web-storage

Any interest in a PR with these changes?

[raubas]

And also (since Im using SSR) an instruction and mocks for web packs replace bundle config.