Modern Kallaa Petti 2.0.0

• 2.0.0: Phone contacts, credits, licence and privacy policy.
  • The About and credits screen shows the author's photo.
  • New: add a customer or supplier from the phone's contacts (party form and the
    bill's customer picker) without the contacts permission; About and credits
    screen with the author's details, the MIT licence, the privacy policy link and
    the components used.
  • Release: MIT LICENSE, privacy policy, the Internet permission declared in the
    manifest (used by Google Play services for the barcode scanner module), and the
    main branch.