Issue #1620010 by dawehner, ParisLiakos, plach, jibran: Move LANGUAGE constants to the Language class.

Issue #1867382 by Berdir, Sutharsan:  Convert drupal_http_request() usage in statistics.module to Guzzle.

Issue #1305378 by bforchhammer, penyaskito, k4v, Schnitzel, Gábor Hojtsy, Dave Reid: Added Tokens should use $options["langcode"] and not need a language object.

Using the language_manager wrapper function to return a language whether or not we're in the requet scope

- Patch #1510686 by cosmicdreams, vasi1186, webflo, disasm: replace remaining references to global () with drupal_container().