Pre-Task project setup

* Add the devops_project.html that outlines the task.
* Add basic setup of README.md to provide solution to the task.
* Add Pre-Task Requirements to outline needed computer setup.
Complete Task #1

 * Add a Gemfile for project gem dependencies installed by bundler.
 * Add a Berksfile containing the cookbook dependencies.
 * Add a Vagrantfile containing the vm definition.
 * Update the README.md with usage instructions.
Task #2 Partially complete.

- Add logstash as a submodule to use grok pattern file for testing.
- Add guard and rspec to the Gemfile.
- Initial commit of pattern file and corresponding tests.