Merge pull request #5 from mobilerider/minor-type-conversion

Convert to `int` the result of the DU action
Merge pull request #4 from mobilerider/minor-exception-improvements

Simple exception hierarchy and raise the corresponding exceptions for 403 and 404 responses
Merge pull request #6 from mobilerider/develop

Develop
Merge pull request #7 from mandx/develop

Develop - Updating from upstream repo
Raise 403 and 404 exceptions in DIR operations
Merge branch 'master' into develop