Add option to specify location of node_modules and package.json

[mersadk]

In my project node_modules directory and package.json file are not in the same directory as gulpfile.js, they are one level up.
As it is now, when I try to run gulp I get

: no such file or directory

It would be nice to have an option to specify location of node_modules directory and package.json file.

[Ylaana]

@mersadk I have created pull request #10 to address this issue.

[dshemendiuk]

Thanks to @theDutchess
Please update to latest version.