New 64-bit MSVC 2012 libraries. Refs #6527
Remove VC100 runtime libraries. Refs #6527

They are now picked up from the VS installation.
Add NeXus debug libs. Refs #6527
Use the 2.7.3 release Python. Refs #6527
OpenCascade VS 2012 libs. Refs #6527
Add HDF4 support to NeXus libs. Refs #6527

They are statically linked so also remove the HDF4 dlls.
Missed other NeXus libs for HDF4. Refs #6527
Remove repository pyc files. Refs #6527

They seem to change anyway when moved to a different location.
Correct the qwtplot3d libs. Refs #6527

They somehow got linked to the debug runtime.
Patch sipconfig & pyqtconfig to work anywhere. Refs #6527