Update to latest CMake finder for DX, from OSG project.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@525 c67418bc-a6eb-11de-8ba5-91705c1537ed
Fixes for building with the DirectX dependency and 64-bit target architecture.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@526 c67418bc-a6eb-11de-8ba5-91705c1537ed
Fix for YPR regression test.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@527 c67418bc-a6eb-11de-8ba5-91705c1537ed