Git shall ignore eclipse IDE and vendor files
Bump version
TDD: UnitTesting with phpUnit

Good code needs testing.
Until now this plugin is not tested at all.
So phpUnit is introduced.

- Supported PHP (currently: 5.3 to 5.5) is tested
- Supported WordPress (currently: 3.7 to 3.9) is tested
Introduced phpSpec

- Automated testing with travis-ci
- Installation via composer
- Configuration for this project
QA: Test code quality with "PHP Mess detector"
TDD: Remove double testing of the latest WordPress

The plugin is being tested via travis-ci.
Unfortunately WordPress 3.9 is tested twice,
because it is the latest of WordPress.
So the explicit version number has been removed.

- Testing only the latest (currently 3.9)
- and the least supported (currently 3.8)
TDD: Added test script to pre-test everything

Testing is done by travis-ci.
This may fail sometimes.
So we better check everything before each commit.

- Run all tests in a single script
- Might be used by travis-ci
TDD: Moved test environment to a sub-folder

WordPress has been extracted to a separate folder.
This was /tmp so it got lost too often for development.
So it has been moved to ./tests/wp-{version}
QA: Assert minimal style of code with CodeSniffer

Every framework wants its own code-style.
A rule-set for WordPress Plugins is missing.
Code Sniffer will assure the code quality
asides PHP Mess Detector.

- TDD: Used new code styling in tests
- QA: Added own rule-set for WordPress Plugins