Add Composer file and update autoloader.

Signed-off-by: Se7enChat <se7enchat@zoho.com>
Update test loop script to use PHPUnit as required by Composer.

Signed-off-by: Se7enChat <se7enchat@zoho.com>
Add composer.lock to the git ignore file.

Signed-off-by: Se7enChat <se7enchat@zoho.com>