Added NPM package.json.

[leighmcculloch]

Added NPM package.json.

As requested by @mef in robflaherty#74

[leighmcculloch]

@mef I'm not very experienced with npm package.json files. Does this meet all the requirements?

[mef]

@leighmcculloch Thanks!

A comma is missing at the end of line 5, making the JSON invalid.

$ npm install git://github.com/leighmcculloch/gascrolldepth.js.git#add-npm-package.json
# (...)
npm ERR! code EJSONPARSE

npm ERR! Failed to parse json
npm ERR! Unexpected token 'r' at 6:4

[leighmcculloch]

@mef Fixed. How are we looking now?

[mef]

I'm afraid there's a trailing comma at the end of line 10, preventing the file to parse correctly.

[mef]

Rest of the file is good, I have checked :)

[leighmcculloch]

@mef Oh dear, thank you for your patience! I don't use npm much and I'm sick in bed so I thought I'd just wing it. I just actually tested it this time and it should be good now.

[mef]

Thank you so much!

I confirm that it works well now :)