Changes in memtailor:

• add in compiler warnings and change c++ standard to c++17

Changes in mathic:

• add in compiler warnings and change c++ standard to c++17
• changes so that under clang++, c++17, this code currently compiles without warnings
• fix null pointer arithmetic warnings

Changes in mathicgb:

• Install all header files (autotools build)
• update FindTBB.cmake and use TBB::tbb