- xml files are no longer considered harmless
- Factorization of the `remove_all` method for office files
- Explicit whitelist are used
- Blacklist are used to skip files completely
- Non-blacklisted files are _still cleaned_
- Unsupported files are still triggering an error
Fedora defines the 'text/xml' mime type for xml files. Adds this mime
type to the harmless parser.
Fixes#36.
Signed-off-by: Antoine Tenart <antoine.tenart@ack.tf>