Setup an example

[krizzu]

We plan to make Async Storage available for more than just React Native, so let's create examples for other platforms too.

1. Create examples/ dir in the root, hosting all other examples
2. Each example app should have all available Storages used for it
3. Examples:
   React Native (examples/mobile)
   React (examples/web)
   Windows (examples/windows)

Blocked

#133
#131

[hmheng]

is new Asyncstorage supporting web, windows and other platforms?

[krizzu]

@hmheng Yes, this is described in the proposal