app: don't log environment variables when they're private
misc/hipache-router: install node 0.8.23
route/hipache: support multiple backends per route
router/hipache: fix Addr implementation

We don't want the address of the backend, we want the address of the
"website".
router/hipache: getting only the name of the route
provision/docker: register backends using http://
cmd: added method Rows to Table

This method will return the number of rows in the table.
cmd/tsuru-base: don't display empty units in the app-info command
testing/provisioner: added method to add units to a fake app
provision/docker: don't try to remove empty containers