Add a Vagrantfile with a 32 bit box

Uses a 32 bit opscode chef centos 6.6 box hosted by aws.
Explain how to use the 32 bit box
Move and rename 32 bit VM Vagrantfile

According to comments on:
https://github.com/DevOpsBootcamp/devopsbootcamp-vagrant/pull/1
Update README to explain how to use the 32 bit VM

According to comments on:
https://github.com/DevOpsBootcamp/devopsbootcamp-vagrant/pull/1
Merge pull request #1 from DevOpsBootcamp/32-bit-box

32 bit box
Discussion on https://github.com/DevOpsBootcamp/devopsbootcamp-vagrant/pull/1