Add "update-vendor.sh" script and vendor our current deps (minus Docker, since that'd make a circle)

Also, updated .travis.yml to use the new "vendor" directory (since this is pretty pointless without that :D)

Signed-off-by: Andrew Page <admwiggin@gmail.com>

Dockerfile

@@ -1,6 +1,6 @@
 FROM crosbymichael/golang
 
-RUN apt-get update && apt-get install -y gcc
+RUN apt-get update && apt-get install -y gcc make
 RUN go get code.google.com/p/go.tools/cmd/cover
 
 # setup a playground for us to spawn containers in
@@ -14,8 +14,10 @@ COPY . /go/src/github.com/docker/libcontainer
 WORKDIR /go/src/github.com/docker/libcontainer
 RUN cp sample_configs/minimal.json /busybox/container.json
 
+ENV GOPATH $GOPATH:/go/src/github.com/docker/libcontainer/vendor
+
 RUN go get -d -v ./...
-RUN go install -v ./...
+RUN make direct-install
 
 ENTRYPOINT ["/dind"]
-CMD ["go", "test", "-cover", "./..."]
+CMD ["make", "direct-test"]