MSSQL on Vagrant

- [x] Write usage docs on the github repo
- [x] Write about the VM provisioning process
- [x] Prepare Sinatra example
- [x] Create some animated gifs with demos for the post
- [x] Get @aneziocampos and @guiloyins to review the post
- [x] :beer: :beers: :beer: :beers: :beer: :beers: