Spotifywebapipython

* Added `Device.SelectItemNameAndId` property to return a string that can be used in a selection list in the form of "Name (Id)".
* Added `Device.GetIdFromSelectItem` method to return the Id portion of a `SelectItemNameAndId` property value.
* Added `Device.GetNameFromSelectItem` method to return the Name portion of a `SelectItemNameAndId` property value.

* Updated `PlayerQueueInfo` to correctly return the `Summary` property value when the queue is empty.
* Removed `SpotifyClient.SearchPlaylists` method argument `spotifyOwnedOnly`, as it can be replaced by other functionality (e.g. `GetCategoryPlaylists`).

* Updated all models that used a `root.get('...',[])` syntax to use `root.get('...',None)` instead, as Spotify Web API will sometimes return a `null` instead of an `[]` (empty array) for a key item value. This was causing methods to fail with `'NoneType' object is not iterable` errors.

* Updated `SpotifyClient.SearchPlaylists` method with argument `spotifyOwnedOnly` to filter found items by owner. This simulates the spotify "content generated for you" functionality provided by the Spotify AI engine.

* Added `ContainsId` method to the following classes: `AlbumPageSimplified`, `AudiobookPageSimplified`, `ChapterPageSimplified`, `EpisodePageSimplified`, `PlaylistPageSimplified`, `ShowPageSimplified`, and `TrackPageSimplified`.
* Updated `SpotifyClient.GetPlayerRecentTracks` method with auto-pagination support to retrieve ALL available items (or up to a limit total).

* Added `SpotifyClient.SearchAlbums` method to search Spotify for matching Album criteria.
* Added `SpotifyClient.SearchArtists` method to search Spotify for matching Artist criteria.
* Added `SpotifyClient.SearchAudiobooks` method to search Spotify for matching Audiobook criteria.
* Added `SpotifyClient.SearchEpisodes` method to search Spotify for matching Episode criteria.
* Added `SpotifyClient.SearchPlaylists` method to search Spotify for matching Playlist criteria.
* Added `SpotifyClient.SearchShows` method to search Spotify for matching Show criteria.
* Added `SpotifyClient.SearchTracks` method to search Spotify for matching Track criteria.
* Updated `SpotifyClient` methods to add auto-pagination to retrieve ALL available items (or up to a limit total). Methods modified were: `GetAlbumFavorites`, `GetAlbumNewReleases`, `GetArtistAlbums`, `GetArtistsFollowed`, `GetCategoryPlaylists`, `GetFeaturedPlaylists`, `GetPlaylistFavorites`, `GetPlaylistsForUser`, `GetPlaylistItems`, `GetAlbumTracks`, `GetAudiobookChapters`, `GetAudiobookFavorites`, `GetBrowseCategorys`, `GetEpisodeFavorites`, `GetShowEpisodes`, `GetShowFavorites`, `GetTrackFavorites`, `GetUsersTopArtists`, `GetUsersTopTracks`.
* Renamed `SpotifyClient.GetBrowseCategorys` method to `GetBrowseCategorysList`.
* Renamed `SpotifyClient.GetBrowseCategorysByPage` method to `GetBrowseCategorys`.
* Added `Category.Uri` property to simulate a Spotify-like Uri value for a category. This is a helper property - no value with this name is returned from the Spotify Web API.
* Updated `PageObject` model with property setters for the `CursorBefore`, `CursorAfter`, `Limit`, `Offset` and `Total` properties. This allows a user to modify the values when performing custom paging operations.
* Updated all `SpotifyClient` methods that utilize a `market` argument to ensure that a market value was either supplied or implied (using an authorization access token with a user profile). The Spotify Web API was returning null results for some methods that did not supply a market value while using a public access token (e.g. no country code default).