load/save KumakoreApp by user (not internal)

[chbfiv]

Saving is currently not saving the user information. Include this in the fix.

[chbfiv]

removed old pref models, and now use JSON and allow the developer to define the path. Kumakore.BuildPrefPath(String filename), builds a path using the platform recommended Paths.

Kumakore ... public static readonly String DEFAULT_PREF_EXT = ".kkp";

if UNITY3D

    public static readonly String DATA_PATH = Application.persistentDataPath;

else

    public static readonly String DATA_PATH = AppDomain.CurrentDomain.BaseDirectory;

endif

    public static String BuildPrefPath(String filename) {
        return Kumakore.DATA_PATH + filename + DEFAULT_PREF_EXT;
    }

Example load/save

_app.load(Kumakore.BuildPrefPath(API_KEY));

_app.save(Kumakore.BuildPrefPath(API_KEY));