playground: Move release.go.playground to release.projects.playground.

Reorganized playground repo: client and pgbundle are no longer
under a GOPATH, and Go code was moved from v.io/playground to
playground.
Added basic Makefile for running tests.

Change-Id: Ie9a118182ce66e6430e85ae90dd76fc762c9879e
43 files changed
tree: ee9f646aa36bc9ce2962f9d89b981eaa8ffa00d0
  1. client/
  2. go/
  3. pgbundle/
  4. .gitignore