Free license images for commercial use added

Signed-off-by: Daniel Pawłowski <danielpawlow@gmail.com>
Free image added

Signed-off-by: Daniel Pawłowski <danielpawlow@gmail.com>
*MainPage.xaml - changed playlist bg image
*OneDriveManager.cs - moved mkdir to another method

Signed-off-by: Daniel Pawłowski <danielpawlow@gmail.com>