[NTG-context] luatex-mplib.lua missing and luatools' output repeated twice

Hi, the luatex-mplib.lua is missing at least in the beta 2010.12.22 for linux x86. luatools' output is repeated twice. for example: $ luatools context.tex /opt/context/tex/texmf-context/tex/context/base/context.tex /opt/context/tex/texmf-context/tex/context/base/context.tex this problem causes i can not use the commands such as `cd $(dirname $(luatools context.tex))`. -- Best regards, Li Yanrui