[WIP] fix #51 - Improve Bridge-gui devops

[bryanchriswhite]

CleanWebpack plugin not doing it's job:

Used to get " is outside of project root. Skipping..." message

webpack-isomorphic-tools aren't really necessary

We're only doing partial server-side rendering of the index document. For this webpack-isomorphic-tools is unnecessary and adds additional configuration complexity.

webpack-dev-middleware and webpack-hot-middleware add unnecessary complexity

webpack-dev-server sits on top of express and can be used instead of webpack-dev-middleware and webpack-hot-middleware, as those middleware add additional configuration complexity as well as additional dependencies.

[lilyannehall]

@MrFancyMonocle review? :)

Awesome progress @bryanchriswhite - let us know when this is ready to merge!