Replace bower with NPM/Yarn

[wjdp]

npm WARN deprecated bower@1.8.0: ..psst! While Bower is maintained, we recommend Yarn and Webpack for new front-end projects! Yarn's advantage is security and reliability, and Webpack's is support for both CommonJS and AMD projects. Currently there's no migration path, but please help to create it: https://github.com/bower/bower/issues/2467

• Need to go through bower dependencies and swap out with NPM ones.
• fGrid will be problematic (I'd quite like to get rid of it)
• Handful of other GH only dependancies

[tomtom5152]

From experience, this is the definition of a PITA, but once you have done it, YARN is so much easier to use than both NPM and bower.

[wjdp]

Will need to look into the styling. From a cursory look around I've found:

• http://bulma.io
• find more

We should be able to shed Bourbon quite easily.

[wjdp]

@tomtom5152 Yeep, hence a backlog task :smile: