Load uglifyjs2 and uglifycss as vendors through NPM to avoid local installation

Hi,
I try to simplify the installation of the CMS by loading these tools through NPM. I couldn't find out how the config.yml files were generated, I'd like to adapt the paths there, for example: 
````
uglifyjs2:
        bin: %kernel.root_dir%/../node_modules/uglify-js/bin/uglifyjs
````
Is that something you are willing to merge once it's finalized? if yes, can you hint me where/how to adapt those paths?
Thanks