Changed PHP 5.4 array initializers to be PHP 5.3 compatible, i.e. [] => array()

Hi Ben,

Not sure if you want to make Github Sync compatible with PHP 5.3 or not but since I still use 5.3 at times I've found it doesn't work because of the array initializers.  I've fixed it to work with PHP 5.3 for at least array initializers with this branch and pull request.