RFC: Add a Makefile

Maybe I am alone in my distaste for the go way fo building.  It's very opaque
and opinionated.  I do not think it is reasonable to demand a user put code in
a particular organization to use it or to require environment variable
fiddling (really?  in 2014?).  I also don't think hand-rolled scripts give a
pleasant experience.

This simple Makefile obsoletes two scripts and a config-script.  It should
provide a pretty-much identical experience.

make - build all binaries
make clean - clean up
make test - run tests
make kubelet - just build kubelet
make test WHAT=pkg/kubelet - test pkg/kubelet/*
I agree that it's awful that Make is required, and yet here we are.

Go's tools do not allow you to express the "generate version info" dependency (and in fact they get some dep tracking flat out wrong).  They force the user to fiddle with env vars.

That is the "state of the art".  This is better, IMO.