adding excon/rspec dependencies

Rather than making a dedicated Socket and Net/HTTP client for this
application, I've chosen to simply use Excon as the library that handles all
that for me. I did muck around in trying to create a Socket/Net::HTTP client
specifically for this project, but found it to fall well outside the scope of
what I'm trying to do here. It was also taking too long to actually do, and
would add too much logic IMO.
adding some skeleton files for things I will need

This commit isn't really useful, but it's here for the sake of being here.
Skeleton for images

Skeleton file full of methods for the images api endpoint so that I don't have
to remind myself what I need to develop next.
Renaming files to singular from plural
More skeleton files
Unix/http context for connection initialization
added options for creation new connection

Added url/options to the connection initialization method.
Closing function block
Added raw method. Changed comments to reflect
Add request wrapper around excon
generic commit
Will now display Info

So I've finally written enough code to get the absolute minimum of this
project working. It can connect to Docker's UNIX socket, and query the Info
api.

Still have a long way to go, but at least it works now (with a failing test).