language: php

php:
  - 5.3
  - 5.4
  - 5.5

script:
  # Run PHP lint on all PHP files.
  - find -name '*.php' -print0 | xargs -0 -n 1 -P 4 php -l
  # Runt the unit tests.
  - phpunit Tests/

Add a Travis configuration file.
[TASK] Add a Travis configuration file.

This change adds a very basic configuration file that lints all PHP files
and executes the unit tests.
