Path changed

I don't want to have to 'sudo npm'. So I moved the node installation to
the somewhat misnomed ~/.local folder, because 'global' npm
installations will be placed in ~/.local/lib.
Improved call to node-inspector

I wanted too make use of node-debug, but that would cause some deeper
changes I am not ready to perform, yet. So I settled with OSX-specific
'open', which might do the trick.