On Ubuntu, nodejs must be symlinked

[steveEU]

Hi Steven,

thanks for this work! After unsuccessfully searching for quite a long time I finally stumbled over your code.
Managed to install it on a VirtualBox Ubuntu 14.04 VM (Win 8 host), but initially got error messages at some certain point of the "npm install -g" process.
Found out that this is a node vs nodejs issue:

The program 'node' can be found in the following packages:

• node
  *> nodejs-legacy
  Try: sudo apt-get install

Seems to be a quite common problem and can be solved by e.g.

sudo ln -s which nodejs /usr/local/bin/node

Maybe you could mention this in your installation procedure.

Kind regards,

Stefan

[stephen]

Hrmmm, I suppose this does belong somewhere, but perhaps not in the README. (Would prefer to not clutter with lots of per-OS install instructions)

Will try to write up an INSTALL.md or similar to hold funny edge things like this.

[stephen]

Added a note here: https://github.com/stephen/airsonos/blob/master/INSTALL.md#linux