What is the difference between layer.name and layer.title?

Tried to specify a title different to the filename in file_upload, but
1: It seems to change both layer.name and layer.title to the same string.
2: It causes the upload test to fail as they need the filename and not the title.

It would  be great to keep track of both basename and nominated title in the layer object.

See FIXME's in storage/io.py
