Fix instructions for libp2p in browser example

[malisetti]

Name: libp2p-in-the-browser
Version: 0.1.0
Node Version: v11.1.0
NPM Version: 6.4.1
Platform: Linux IMCHLT047 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Severity: Medium

Description: when followed the steps from https://github.com/libp2p/js-libp2p/tree/master/examples/libp2p-in-the-browser i get the below error.

Error: $ npm start

libp2p-in-the-browser@0.1.0 start /home/seshachalamm/js-libp2p/examples/libp2p-in-the-browser/1
npm run bundle && npm run serve

libp2p-in-the-browser@0.1.0 bundle /home/seshachalamm/js-libp2p/examples/libp2p-in-the-browser/1
browserify src/index.js > public/bundle.js

Error: Cannot find module 'fsm-event' from '/home/seshachalamm/js-libp2p/src'

Steps to reproduce the error:

Follow the steps from https://github.com/libp2p/js-libp2p/tree/master/examples/libp2p-in-the-browser

[malisetti]

Doing an npm install in js-libp2p directory solves this.

[jacobheun]

We should update the instructions to indicate the need to run install in project root.