Use official HAP-Java

adjust to changed `HomekitAuthInfo` interface #3

HAP-Java changed the interface to have a `hasUser` method, which indicated whether a user was paired already or not.
This interface change remained undetected, because it has a default implementation.

The effect of not implementing the method is that HAP-Java will always be in pairing mode. A restart of the app will lead to 'no response' displayed in the home app.

Fixed-value constructors

• Add secondary constructor that accepts fixed values to characteristics
• Improve code-generation by using KotlinPoet instead of string-templates

Initial release

0.5

initial commit