Simplify configuration initialization

[lumiasaki]

Current situation

Currently, when developers initialize an instance of Configuration for SceneBox, they need to distribute not only states from product aspect, but also unique identifiers for them, which is meaningless for developers, we want developers keep focusing on states from product level, since that this time we simplify the while process for initialization of SceneBox and Configuration.

Changes

Based on conclusions as above, we deleted the process about distribution unique identifiers and bind them with state of scenes. Meanwhile, lazyAdd APIs from SceneBox switched to use scene state rather than identifier.

Further more, we believe the navigationController assignment in Configuration was also a redundant process, due to developers already set navigation controller for the first scene in entry block.

Lastly, in order to organize the setting steps of SceneBox into one place, this time we introduced a new type ConfigurationFile, which can make you to put all your configurations into one place, and be easier to reuse it just like a file, in this ConfigurationFile, you can distribute your scene states and decide which extensions will be enabled for SceneBox.