#853926 by yched: Fixed Wrong order of multi-value file fields when form rebuilt (preview, failed validation)

- Patch #976758 by pwolanin, sun: existing machine names are changed when human readable name is changed (e.g. node type, vocabulary).

- Patch #867114 by jhodgdon, mgifford, sun: search results should add lang tag if language of search result differs.

- Patch #827116 by jhodgdon, marvil07: search API is inconsistent in /, and generally needs doc cleanup.

#933856 by Damien Tournoud: Fixed xpath() return values are inconsistent, leading to failing tests on some environments.

#875132 follow-up by seutje, sun, Jacine: Better method of preventing contextual links from cutting off in footer.

#678592 by jhodgdon, effulgentsia, David Rothstein, iLLin: Fixed Admin theme is used is for adding taxonomy term, but not for editing taxonomy term

#460448 follow-up by chx: Replace advanced regex incompatible with PCRE < 7.2 with function-based approach.

#939568 by merlinofchaos, sun: Enable finer control for ajax-using modules of the trigger response in the ajax object.