added test docs to readme; add doc info to tests

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>

script/run-integration-tests

@@ -1,7 +1,3 @@
 #!/bin/sh
-# HACK: until identity is merged
-curl -sSL -o .docker-identity https://bfirsh.s3.amazonaws.com/docker/linux/docker-1.3.1-dev-identity-auth && chmod +x .docker-identity
-./.docker-identity > /dev/null 2>&1
-godep go build
 go test -v ./_integration-test
 

script/test-integration

@@ -1,4 +0,0 @@
-#!/bin/sh
-set -e
-docker build -t docker-machine .
-exec docker run --rm $* docker-machine ./script/run-integration-tests