Replaced all "unsigned long long" types with uint64_t.
These "new" types better communicate their meaning and they are
guaranteed to behave the same on all platforms & compilers.
* 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
