Updated build system with Makefile, and DevStudio sln and vcproj files.
- The DevStudio/msvc build does not work for shared libraries (dll)
- Fixed QhullFacet::PrintRidges to check hasNextRidge3d()
- Cleaned up Qt project files
- Fixed Makefile for shared libraries
- Moved libqhull to libqhullstatic, as done in CMakeLists
- Made libqhull a shared library
- Restored /INCREMENTAL:NO since CONFIG -= incremental did not work
- Added 'facets' argument to user_eg3.cpp