Mavenizing the project

[bartfaitamas]

Removed the eclipse project files from the repo. The recommended approach to reimport the project into eclipse:

• Delete the project in eclipse (just the project, not the content)
• Install m2e through the marketplace (Help > Eclipse Marketplace)
• For the APT source generator to work in eclipse automatically install m2e-apt. In eclipse: Window > Preference > Maven > Discovery > Open Catalog
• Merge the pull request
• Import the project into eclipse File > Import > Existing Maven Project
• Go to Project Properties > Maven > Annotation Processing, enable project specific settings and turn on annotation processing