Initial version of PHP client

.gitignore

php-client/bin/monitor.phar

php-client/box.json

php-client/composer.json

php-client/composer.lock

php-client/nbproject/project.properties

php-client/nbproject/project.xml

php-client/phpunit.xml

php-client/scripts/release.sh

php-client/src/LoadAvg.php

php-client/src/Main.php

php-client/src/PingCommand.php

php-client/src/Reboot.php

php-client/src/SensorInterface.php

php-client/src/Updates.php

php-client/src/autoload.php

php-client/version