If you want to use bitcoinjs-lib in Meteor js, try out this package: https://atmospherejs.com/ca333/bitcoinjs
add it via:
meteor add ca333:bitcoinjs
Before you test it, you should install npm package:
npm install bitcoinjs-lib
Keep in mind that this package lets you access the library only through server - so, no client side code can use it directly. You must use meteor server methods.