2.0.0

BREAKING: The local AssetLoader class deleted, now using the one from easy_localization itself.
BREAKING: Depends on connectivity_plus ^4.0.0 and http ^1.0.0.
Const constructors in:
- FileAssetLoader
- HttpAssetLoader
- JsonAssetLoader
- TestsAssetLoader
- XmlAssetLoader
- YamlAssetLoader

0.0.1