ruby 2.1

Add Dockerfile to ruby 2.1
Moved LICENSE to root and create README.md

Moved LICENSEs files to root dir;
Create README.md file in root dir;
Removing ONBUILD instructions from php-apache*
Adding global Makefile

Adding global Makefile and change other Makefiles to use `adocker` instead of `docker`;

`adocker` is alias to `azk docker`;
Merge pull request #1 from gullitmiranda/feature/ruby

Adding Dockerfile for `ruby 2.1` and updating README files