Split into several jobs

Run build, lint and unit-test steps in a container, using a pre-built
image to save rebuilding at CircleCI

Move a couple of scripts up to config.yml for clarity

bin/circle-deploy-master

@@ -6,4 +6,4 @@ docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
 cd $SRCDIR
 make clean-bin
 # CircleCI doesn't let us install the qemu module to do ARM docker builds
-make publish ALL_ARCHITECTURES=amd64 UPDATE_LATEST=latest-only
+make publish ALL_ARCHITECTURES=amd64 UPDATE_LATEST=latest-only SUDO= BUILD_IN_CONTAINER=false