Added function opcache_is_script_cached(). (Danack)
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Added function opcache_is_script_cached(). (Danack)

Conflicts:
	NEWS
Merge branch 'PHP-5.6'

* PHP-5.6:
  Added function opcache_is_script_cached(). (Danack)