[gnome-games] (30 commits) ...dummy: Drop DummyRunner

[Alexander Mikhaylenko <alexm src gnome org>]

Summary of changes:

  ecb6f67... runner: Store title as string (*)
  72b498a... game: Add get_uri() (*)
  a10609d... core: Add RunnerFactory (*)
  61fe1ba... retro: Add RetroRunnerFactory (*)
  36803b4... game-collection: Add add_runner_factory() (*)
  6ab38e9... game-collection: Add create_runner() (*)
  c377323... application: Register runner factories for simple types (*)
  c43949f... generic: Add GenericRunnerFactory (*)
  cb604a5... plugin: Add get_runner_factories() (*)
  7326204... application: Register runner factories for plugins (*)
  8b3833e... desktop: Add runner factory (*)
  2d4b0ba... dreamcast: Add runner factory (*)
  48aa59d... game-cube: Add runner factory (*)
  2bf51b2... libretro: Add runner factory (*)
  b2c9b18... love: Add runner factory (*)
  ad0bd1f... mame: Add runner factory (*)
  e6cb91a... ms-dos: Add runner factory (*)
  a9fbb03... nintendo-ds: Add runner factory (*)
  07110a5... playstation: Cache game info (*)
  0be2c61... playstation: Add runner factory (*)
  66fabdd... sega-cd: Add runner factories (*)
  8e033b1... sega-saturn: Add runner factory (*)
  579a42f... steam: Add runner factory (*)
  268b934... turbografx-cd: Add runner factory (*)
  c8e5490... virtual-boy: Add runner factory (*)
  d9a2348... wii: Add runner factory (*)
  f82744a... application: Provide access to GameCollection (*)
  63ad702... display-view: Use create_runner() (*)
  59ca5b2... game: Don't store runner (*)
  d1d8c38... dummy: Drop DummyRunner (*)

(*) This commit already existed in another branch; no separate mail sent