* Add sensible React base to the app for frontend
This PR attempts to "reactify" Kolide and provide a sane development environment
that a front-end engineer would probably expect.
This PR accomplishes by doing the following:
1. Reorganizes the app into a `server/` and `client/` folders to keep golang
logic separated from react logic.
2. Adds an "asset pipeline" via webpack which knows how to build a js
and css bundle.
3. Packages up all static assets in a go-bindata file so that the binary
remains portable without external file dependencies.
1. Add a Makefile with several targets that will be common in everyday
development. For example, we have `serve` target which spins up a nodejs
reverse proxy on port 8081 which then watches for changed files, automatically
rebuilds the app, and hot loads the new JS/CSS in.
**Note:** Please use `make` to build the app, not `go build` as there are
now several things that need to be orchestrated beyond the go code to build the app.
* Create build if it doesn't exist, and use `go get`
* Improve README to reflect new dev workflow
* Document css vars and funcs and use alias paths
* makefile and structure modifications
