Upgrade Docker image to Ubuntu 16.04 LTS, add bazel and deps.#575

Merged

mattklein123 merged 2 commits intoenvoyproxy:masterfrom

htuch:bazel-xenial

Mar 15, 2017

Commits on Mar 15, 2017

Upgrade Docker image to Ubuntu 16.04 LTS, add bazel and deps.
htuch
committed
Fix copy+paste snafu from https://bazel.build/versions/master/docs/install.html, no need to upgrade.
htuch
committed