custom path package.json

[francescoagati]

i don't know if this pull can be right. With this pull is possible specifty a custom path for package.json.
Sorry for the delete of end line ;-)

[fponticelli]

I don't like the idea of changing the static variable so I would suggest one of two possibilities:

• add a command to change that variable globally (not an optional argument of npmInstall)
• change the function signatures to pass down the package json var.

Give me back my end line! :D

[francescoagati]

ok. i don't know if this pull request can be useful. the unique case i think is if i wanna download the node_modules folder locally for put the it and package.json in a folder build