* Isolate modules for uncontainerized navigators
* Clean up prop-types
* Fix warnings and web import friendlyness
* strip a flow
* Standalone provider/consumer navigation context
* export shallowEqual as module
* address various lint
# Conflicts:
# src/navigators/createStackNavigator.js
* Get tests to pass
* Fix animation (#1493)
* Rewrite the file animatedInterpolate.js. To increase readability.
* Rename the variable, To increase readability.
* minor renaming