readme: Specify package name in link command (#41)
readme: Specify package name in link command (#41)

Calling react-native link without specifying a package name runs the linking process for all project packages with native modules--some packages incorrectly link twice which can be painful to revert when all we need to do is just link react-native-keep-awake.
corbt/react-native-keep-awake,corbt/react-native-keep-awake,corbt/react-native-keep-awake