Add message to indicate process is running via a docker container when using version/info/help flag

[clubdeuce]

e.g. php -v

Add to end of output

[mikeschinkel]

Put on bare commands only, php --help or wp

[mikeschinkel]

We can update this above the 0.16.0 box bits are baked.

[mikeschinkel]

We are probably to create something like a javascript to poll the box and see if there any notices and we can add that JS to WPLib Box Support plugin. We can later have our Admin UI poll the box too.