Add a dockerfile to build in a container
Multipart:

1 Convert the README to markdown
1a Demo compiling with docker & extracting a binary
1b Show the linking & dependencies
split the docker into 3 parts & add a makefile
standardize on /usr/local
cleanup Makefile
tidy up `make clean` target
add a makefile dependency
cleanup dotfiles
/usr/local
forgot a Makefile dependency
use the full docker.knewton.net url
match target names with other project makefiles
Merge pull request #4 from dysinger/2766-check-graph-without-nix

2766 check graph without nix