Update project to Unity Editor 2017.2.0p1

Unity finally added the WinMR support with the 2017.2.0p1 release

Improvements

XR - Improved performance on Windows Mixed Reality by removing a potential thread stall that would occur whenever beginning a new frame while the previous frame had not completed presenting.

(946829) - XR: Fixed landscape left being forced when landscape right is disabled.
(927404) - XR: Fixed incorrect culling when using multiple cameras with Windows Mixed Reality.
(950519) - XR: Fixed Assert when playing Mixed Reality applications in Editor without Mixed Reality Portal running.
(952039) - XR: Fixed Holographic Simulation not working in Editor.
(943109) - XR: Eliminated errors and warnings showing per frame in console during Holographic Emulation.
(948814) - XR: Fixed crash in Editor when toggling play mode after blooming to shell on Windows Mixed Reality.
(956693) - XR: Fixed issue with "Unsupported texture format .." warnings appearing when XR is enabled.
(909869) - XR: InputTracking.Recenter is now hooked up properly on Windows Mixed Reality.
(942154) - XR: Tracking loss screen no longer appears on WindowsMR headsets, now mimics the behavior of other platforms during tracking loss.
(945163) - XR: Tracking space type now falls back to Stationary when boundary hasn't been configured.
(946714) - XR: Fixed issue with being able to set tracking space type to Stationary.
(949193) - XR: Camera transform changes during and after tracking loss now mimics other platforms' behavior.