Network Plugin

One big piece of missing functionality is a plugin for inspecting and interacting with network traffic. Ideal features for this plugin:

• Persist network request / response with relevant data via an OkHttpInterceptor.
• Allow user to view a live list of request / response pairs, tapping into an item shows all associated data.
• Allow user to modify the environment at runtime from a spinner populated with predefined base urls (potential dependency on #54)
• Will likely need a no-op implementation of this plugin since the host app must reference the interceptor.