[boost] build of 1.56.0 has no tools/build/v2

Hi, The build has changed or the docs http://www.boost.org/doc/libs/1_56_0/more/getting_started/unix-variants.html... are correct and tools/build/v2 is missing There is a bootstrap.sh in tools/build and I used it successfully And then built the libs I needed so I'm guessing the docs on getting started aged slightly. I didn't need tools/build/v2/user-config.jam this time but do see the bootstrap build of bjam produces a ./build.tool/share/boost-build/example/user-config.jam For new users maybe a little cleanup on getting started would be helpful