Bug 1021: Add OculusSDK binding / Basic OVR support (Bring-up on Windows w/ Mingw64 ; Solve static linkage of stdc++)

- Bring-up on Windows w/ Mingw64
  - Bumped oculusvr-sdk to commit 70e44b846ceaf9eebc336b12a07406c3a418a5c3
  - Added required mingw64 linker statments
  - Builds and runs on x86_64 and i386

- Solve static linkage of stdc++
  - "-Wl,-Bstatic -lstdc++ -Wl,-Bdynamic" MUST come AFTER all object files!!
  - No more manual '--undefined=symbol' required .. puhh :)

- Cleanup linker cfg ..

- Still runs on GNU/Linux x86_64 and i386