Deals with blinkbox Books virtual URIs and acts like a local File object.
mapper = Mappings.new(
"http://quatermaster.blinkbox.local",
service_name: "Labs/example_code"
)
mapper.open("bbbmap::testfile:/some/path/component.epub") do |io|
p io
# This is a Tempfile object, interact with it as you wish!
end
# Temporary file has been deleted