Use BOOST_UBLAS_MOVE_SEMANTICS to improve execution speed

[campreilly]

Copy elison allows the compiler to automatically optimize out unnecessary copy operations on rvalues.

see

• http://www.boost.org/doc/libs/1_49_0/libs/numeric/ublas/doc/options.htm
• http://cpp-next.com/archive/2009/08/want-speed-pass-by-value/

[campreilly]

It appears that BOOST_UBLAS_MOVE_SEMANTICS can improve speed. Experimenting with this on test_move_semantic branch 9dc5c8d389ecb07c26eb1ef6c4857e66feddbf4d.

• Grabbed test_move_sematics.cpp from uBLAS site and made it a USML study.
  • Both Visual C++ 12 and gcc on CentOS correctly processed the move semantics.
• Ran cmp_speed test in Release mode on CentOS with no changes.
  • Times were 7.0 to 7.3 sec on my computer.
• Added -DBOOST_UBLAS_MOVE_SEMANTICS to CMake configuration and recompiled
• Ran cmp_speed test in Release mode on CentOS with no move semantics on.
  • Times were 6.6 to 6.8 sec on my computer.
  • A 6% speed increase is not a huge improvement, but it isn't trivial either.

[campreilly]

On the C++17 build, the new times are 2.779 sec for 100 target in cmp_speed. Just 2.314 with move semantics turned on. A 17% improvment.