add an example of docker ps, and also of link aliases
Move test cpu shares out of test start

Fixes #2107
Merge pull request #3057 from crosbymichael/test-cpu-share

Move test cpu shares out of test start
Merge pull request #3010 from SvenDowideit/origin/docker-ps-linked-container-alias-example

add an example of docker ps, and also of link aliases
Save layersize on pull

Do not display size and virtual size on the cli.
Only display virtual size on the cli
Merge pull request #3074 from crosbymichael/dm-history-calc

Save layersize on pull