Support React Native 0.48

Updated Documentation and typings for pin/fingerprint

Handle Android RN 0.47 breaking change

Typescript support

# Conflicts:
#	deviceinfo.d.ts
#	package.json

add typescript types

Change PIN/Fingerprint check from constant to callback

Compatible with old versions of react native

Add PIN/Fingerprint Check to Device Info

Use table to show various methods and returns.

Use System for System.

Fix missing CFBundleShortVersionString crash

Update RNDeviceModule.java

Update buildToolsVersion to 25.0.1

There might be some scenario where the developers who are using this library might not be using Bluetooth permission. so this mDevice object will be null in this case and it should be handled properly. As some will not want to add this unnecessary permission in their project.

Prevent a crash if `CFBundleShortVersionString` is not defined in info.plist