issue #4: port most code to Direct2D. Only remaining GDI code is RiftWindow::CaptureScreen, which is very complicated to write in newer APIs.
Merge branch 'fix-readme' into develop
partially issue #4: rewrite unity configurator with "retry within some duration" strategy to make it more stable. replace IEnumerator with for each.
issue #4: Increase FPS by correcting timer usage. No noticeable latency except for occasional lags (acceptable).
groundwork for issue #5: pre-allocate bitmap. add topleft pixel heuristic to detect readiness of oculus content
issue #5: add fade-in & fade-out
issue #10: add code to set resolution combobox to "1280 x 800"
issue #3: arbitrary app switching from HUD.
add usage to README
kill process when launch failed
Merge branch 'develop'