Jamfile exposing the system installed Boost to Boost-Build

• Auto detect -mt suffix
• Expose target for most libraries
• Expose dummy target headers to be compatible with using boost sources
• Works with MSVC (Libraries must be in PATH)

Alias it with your Jamroot:

use-project /boost : libs/SystemBoost ;

Use it in your target:

exe MyApp
    : MyApp.cpp
      /boost//program_options
      /boost//date_time