For day seven of our 12 Days of Hidden Gems, we are continuing our exploration of wearable cameras! When it comes to extreme videography, there is no name as prominently associated with it as GoPro (GoPro.com). Over the weekend, the GoPro team delivered a significant update for Windows Phone, finally enabling support for their latest HERO4 device. So how is that Windows Phone app and does the GoPro HERO4 live up to the hype? Let's find out in our latest Hidden Gems.