PSMoveServiceEx-PSVR v0.27.8.1 preview.2

Preview.2 fixes PSVR built-in LED activation during color calibration. Opening PSMoveConfigTool > Calibration > Calibrate Tracking Colors now requests HMD position tracking, which enables the configured headset LEDs so webcam color sampling can be completed. This remains unsigned preview software for seated SteamVR/iVRy testing. Download the Win64 ZIP and its SHA-256 sidecar; retain BUILD_INFO.txt when reporting results.