change file path format
From now on we'll be using format 'file/sha256/' instead of 'file/sha256-'.
include new schemas in package and in tests
fix typing mistake i tests
facilitate for including other schemas in submodule and expose them to other packages
move to a namespace package under 'hydrilla'
test&fix error handling
add test case with modified index.json from the example
extend the automated test case
initial commit