Reference fix

Couldn't stand reading node-forward when my head knows it's iojs, sorry.
Dockerfiles for iojs and libuv on debian stable and testing
Giving a cleaner final image
Migrate /opt/node -> /opt/iojs
debian-*: IO.js -> io.js on adduser --gecos opt
Merge pull request #5 from ghostbar/feature/debian-containers

Dockerfiles for iojs and libuv on debian stable and testing
Merge pull request #7 from ghostbar/feature/change-node-to-iojs

Migrate /opt/node -> /opt/iojs
Merge pull request #3 from ghostbar/patch-1

Reference fix
Addresses #10 and #2
Merge pull request #11 from wblankenship/upgrade

Addresses #10 and #2
Quick how-to use this containers
Readme: extend doc with better explained usage