Replaced blank nL_get_lang with nL_current_lang
Dropped abandoned process_langs method, fixed post_type_exists method
Added process/localize_url methods, updated get_permalink to use localize_url
Added process/localize_url aliases
Reworked nLingual_detect_requested_language hook to use nL_process_url, and enable locking on domain/path/get/post matching.
Added nL_localize_url to various permalink filters.