playground: Remove compilerd sudo requirement.

Invoking docker doesn't require sudo if the user is in the docker
group. Removed sudo calls and added group requirement to readme.
Also removed shutdown command from compilerd. External watchdog can
be used to shutdown machine when compilerd exits.
Made shutdown and run timeout parameters more flexible.
Reverted to using netrc instead of gitcookies.

Change-Id: I236152f2820796e2951a5827aeb01a5ea2b17d5f
12 files changed
tree: f79d0efffa3dd0708fa9bef89febc25db9890c2a
  1. client/
  2. go/
  3. pgbundle/
  4. .gitignore