phalcon_get_current_key_w()

Box hash key into an undestructable zval so that a call to
phalcon_memory_observe() can be avoided
Drop array_merge_recursive_n() in favor of phalcon_array_merge_recursive_n()
Kill TSRMLS in phalcon_array_merge_recursive_n()
Merge pull request #830 from sjinks/faster-merge

Faster phalcon_array_merge_recursive_n()