Useful documentation page on how to use npm with git to install modules during development

[Antranig Basman]

An increasingly frequent task we face in Infusion and the GPII is dealing with the workflow of a module 
which is under development in a different github repository, which is embedded as an (npm) submodule in a 
wider project. An example is coordinating changes in Fluid Infusion which may be happening in a branch, 
together with work on GPII's universal which is having changes reviewed which are dependent on the branch work.

Yura has prepared a useful documentation page for people in this situation, which explains the relevant 
arguments to npm install which can cover different working models:

http://wiki.fluidproject.org/display/docs/Using+NPM+to+install+infusion+and+node-jqUnit