2d61e9d4fc
This converts the Indexer class from something that strictly generates index.html files for folders to a more generic class that will be able to hold other types of transformations we might like to do on the total collections of uploaded files. The index.html specific arguments are moved into make_indexes() and the two helper functions that should not be called externally are renamed private. Change-Id: I388042ffb6a74c3200d92fb3a084369fcf2cf3a9