TBR: Mv lib/shell from core to playground which is now the only code that uses it.

Change-Id: I824ffe1f933b82f9e8f318f390e7e99b3bef6ca2
7 files changed
tree: d92670795edf20e590ddf2b2af2f8f2d4f6e8b5e
  1. client/
  2. go/
  3. pgbundle/
  4. .gitignore