* Add .gitignore file with rules for
  * Ignoring composer-related files
  * Vendor related files
* Add composer.json for this library (untested)
* Add folder structure for src and tests
* Add a few base classes, abstract Entity is well on its way
* Add tests for CodebaseHqApi and Entity
* Add phpunit.xml for configuration (bootstrap is pointing to a composer-generated file, does not exist without running composer)