Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1 into 4.7-integration

Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1:
  The lastCenterPoint should be equal to centerPoint for new gestures.
  PinchGesture: lastRotationAngle should start at 0.
  tst_qnetworkreply: Add testcase for unknown authentication method
  QNAM: Reset authenticator state properly between requests
  msvc: enable unreferenced code elimination in release with debuginfo builds
  exclude headers in builddir from -copy option
  more elegant treatment of qconfig.h special case
  simplify recursive symlinking