Update package.json

Hello,

I have problems in using gti-scripts on windows : when I run git-scripts, I have this error :
./bin/install is not recognized as internal or external command

I tried to modify the package.json according to http://shapeshed.com/writing-cross-platform-node/ title "Scripts in package.json".
But it still don't work...

Maybe the problem is doing the symlink of git-hook in directory ?
What do think about that ?

Thanks,
Bertrand