This merges the distinct code path for the export of ArrayAccess
capable PHP objects back into the "common" PHP object export code.
Sole difference is that the ArrayAccess-style object has index
property handlers as well as property bridging to Array.prototype.
php_v8js_hash_to_jsobj is called for all wrapping to JS objects, be it
a PHP associative array or a PHP object. I've now splitted both parts
into seperate functions since they don't share any code any longer
anyways.
