Fix cmake with msvc generator.

* Remove unused libnest2d files. Make it use the global build script targets.
* Modify FindTBB to address multi-config builds and take care of __TBB_NO_IMPLICIT_LINKAGE
* Move FindNLopt to project common cmake module dir
* Rename libnest.hpp to nester.hpp and libnest.h to libnest.hpp 
* Clean up common test suite build scripts

src/libslic3r/Time.cpp

@@ -11,7 +11,7 @@
 #include <map>
 #endif
 
-#include "libslic3r/Utils.hpp"
+// #include "libslic3r/Utils.hpp"
 
 namespace Slic3r {
 namespace Utils {