Refactored models and services for later use
refactored app bootstrap
Adds comments
Updates capitalization
Test suite improvements:
* Added Neo4j installation file to make it easier to run tests locally
* Update the `.gitignore` to account for potential accidents with the Neo4j installation script
* Minor refactoring of some of @ikwattro's fine work
* Added the there4/slim-test-helpers lib as a dependency
* Added the `WebTestCase` class
* Consolidated the PHPUnit configuration files
Merge pull request #20 from ikwattro/app

refactored app bootstrap
Removes index_dev.php
Test suite setup with app.php refactoring.
Merge pull request #22 from guillermoandrae/test-suite

Test suite improvements w/app.php refactoring.