Standard interface for loading a concrete IBundleDirectory.
Using this the application can make a chain of loaders as long as each layer implements this interface. Augmented by the BundleDirectoryLoaderExtensions.
|Initialize (BundleManager manager, string absolutePath, int version, string baseUrl)
Sets the source URL to the manifest and where all remote content is expected to be found.
Can be updated during application run for a version change.
|If cached locally and version number matches, won't hit network
|manifest path. Not necessarily from baseUrl
|prepended to all bundle requests. Ends with slash. Typically BundleManager.GetUrlPath(absolutePath).
Get the current directory
Only valid after Initialize completes without error.