Added command-file capability for msvc and metrowerks static libraries
Changed MSVC-tools.jam so that it would work without the prior use of VCVARS32.BAT
----------------------------------------------------------------------
Modified Files:
boost-base.jam metrowerks-tools.jam msvc-tools.jam
jam_src/execnt.c jam_src/makedebugjam.bat
----------------------------------------------------------------------
[SVN r11852]