Create AppDF validator about appdf

[thevery]

maybe at least xsd schema if we use XML?

[vassiliphilippov]

XSD scheme is a good first step but it is not enough. You cannot check with XSD scheme ZIP content, that there are file with right names, that they have right types, that screenshots have right sizes, etc.

[thevery]

another option: make zip package tool with validation feature.

[vassiliphilippov]

Validator will be a part of the parser. So after the parser is created it will be easy to create a web service for AppDF validation. Will reopen this task after the parser is ready