Switching to new dep tool (#616)

* making things work

* #506 - Add ability to login to a private docker registry

* Rolling back "make things work" to test them out more.

* Rolling back "make things work" to test them out more.

* credentials from docker/config.json if ENV is missing

* should get docker auth info just in the init

* update glide lock

* update glide

* Switched to new go dep tool, glide is too frikin annoying.

* Updated circle builds to use dep

* Added GOPATH/bin to path.

* Added GOPATH/bin to path.

* Using regular make test, instead of docker one (not sure why it was using the docker one?).

api/runner/docker-registry.go

@@ -0,0 +1,22 @@
+package runner
+
+import (
+	"strings"
+)
+
+type dockerRegistry struct {
+	Name     string `json:"name"`
+	Username string `json:"username"`
+	Password string `json:"password"`
+}
+
+type dockerRegistries []dockerRegistry
+
+func (t dockerRegistries) Find(name string) *dockerRegistry {
+	for _, v := range t {
+		if strings.HasSuffix(v.Name, name) {
+			return &v
+		}
+	}
+	return nil
+}