Update npm modules; Remove warnings about loading scripts using docum…

[AnthonyCalandra]

Instructions

Update npm and node and clear old modules. Here's how to do it using n on Linux/OSX:

# Make sure you're in the ethereal-irc dir.
npm i -g n
n latest
n use 7.5.0 # Verify this worked by doing: node -v
npm update -g npm
rm -rf node_modules/

Once the above steps are completed and you've pulled in this branch. Run npm i.

Verify it worked by starting up the app. There should be no errors when you run npm run webpack-server, npm start, and there should be no errors in the app's devtools log.

[drewlindsey]

Checked on windows. Updated NPM to 4.2.0 (as opposed to 4.3.0) and NodeJS to 7.5.0 manually.