As Apple reportedly plugs away at getting a wearable augmented reality device to market by 2020, the company has bought another startup that could prove useful in the development, TechCrunch reports. Apple has purchased Canadian AR headset startup Vrvana for around $30 million according to two sources familiar with the deal. Vrvana gained notoriety with its Totem headset — which combines both AR and VR technologies to create an “extended…