[WP8] add option to not lock the phone while playing music

[Kuba46]

Windows phone do not support to turn off autolock of device like another mobile systems. Maximum autolock time is 5 minutes. It is very anoying while listening to music in car.

It needs to be set by app - http://msdn.microsoft.com/en-us/library/windows.system.display.displayrequest.aspx

Can you implement this feature?

I think it will be very helpful to many people using Spotify in a car!

Thank you