* Adds support for statically building
* Adds crossbuild-in-docker
* Reworks nodeup-in-docker to just use golang image (saves time vs rebuilding image)
* Adds build rule for GCS upload
* Adds go1.7 build check
After playing with the pulled Docker container again, we need to make
sure the models are really alongside the executed binary (kops doesn't
resolve the symlink). Simplify this a bit, too.
Add a simple Dockerfile that can build kops, and a short README on how
to build it. This generates a 425M image, which is about as tight as I
could get it in a short amount of work without just busting apart the
golang:1.6-alpine image to compress the Go layer itself. It's good
enough for what I'm planning to use it for: CI builds.
Along the way: Fix-up .gitignore to include more from k8s/.gitignore
(include editor ones, and terraform output dir).