Fix issues with app name vs display name

[rockfordlhotka]

Right now we require that the app package name exactly match the display name.

We should treat these as separate values.

The display name should be captured from the appx and displayed to the user as we do today.

The actual package name (in the identity element of the manifest) should be captured from the appx and provided to the client app, because it is this value that allows the client to match the app package to the list of installed apps on the client machine.

[dpdonahue]

At the moment we're capturing the Identity element into the PackageFamilyName:

PackageFamilyName = Name + "_" + Publisher;

This is known to not be correct though, the PackageFamilyName should be a hash. But so far I haven't found a working algorithm to calculate it. We're using the PackageFamilyName to identify the app, such as in the GET requests for an appx or a logo.

Is this what you mean?