add command to build arbitrary origin docker images
Merge pull request #147 from bparees/build_images

add command to build arbitrary origin docker images
Also setenforce
Turn on the tcp reuse flag, to be able to reuse TIME_WAIT sockets and
prefer using local images to builders env var.

also prefer using local images for builds
Merge pull request #149 from bparees/master

Turn on the tcp reuse flag, to be able to reuse TIME_WAIT sockets and prefer using local images to builders env var.