Added ruby 2.1.3 binary

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>
Merge pull request #126 from intercity/jb-ruby-2-1-3-binary

Added ruby 2.1.3 binary
Make nokogiri use syslibs

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>
Merge pull request #128 from intercity/jb-custom-backup-gem

Make nokogiri use syslibs
Added test-kitchen

* MySQL test
* App creation test
* Nginx is running test
Merge pull request #120 from intercity/add-test-kitchen

Add test kitchen and tests for nginx, mysql and application configs
Update test-kitchen readme
Add nodes/.gitignore to gitignore.

This allows the nodes/* to be placed under its own git-repo, so users
can manage the nodes/ directory in a separate git repo.
For that, the users probably want a .gitignore file in there too, to
ignore e.g. the sample_host.json.