i18n messages for spellcheck.py

(automatic submodule update by svn2git)

https://mediawiki.org/wiki/Special:Code/pywikipedia/10270
i18n support

https://mediawiki.org/wiki/Special:Code/pywikipedia/10271
L10N for zh, zh-yue, submitted by YFdyh000 (bug #3525883)

https://mediawiki.org/wiki/Special:Code/pywikipedia/10272
fix some wiki syntax before cleanup links.
translateMagicWords implemented but not freed yet,
minor changes due PEP 8

https://mediawiki.org/wiki/Special:Code/pywikipedia/10282
fix page generator from rewite branch

https://mediawiki.org/wiki/Special:Code/pywikipedia/10287
re-order imports

https://mediawiki.org/wiki/Special:Code/pywikipedia/10295
km-wikibooks is eigther still open or re-opened,
update language_by_size (bug #3532357), update from rewrite r10299

https://mediawiki.org/wiki/Special:Code/pywikipedia/10300
New option -async enables asynchron saving the page, request bug #3532278
update from rewrite r10301

https://mediawiki.org/wiki/Special:Code/pywikipedia/10302
update mw version to 1.20wmf4, update from rewrite r10303

https://mediawiki.org/wiki/Special:Code/pywikipedia/10304
ip_regexp matchs ip6, update from rewrite r10303

https://mediawiki.org/wiki/Special:Code/pywikipedia/10306
update several namespace aliases

https://mediawiki.org/wiki/Special:Code/pywikipedia/10307
update several namespace aliases

https://mediawiki.org/wiki/Special:Code/pywikipedia/10308
Page.getSections() and corresponding unittest for wikipedia added

https://mediawiki.org/wiki/Special:Code/pywikipedia/10309
Page.userNameHuman() and Page.purgeCache() added

https://mediawiki.org/wiki/Special:Code/pywikipedia/10310
Page.append() added

https://mediawiki.org/wiki/Special:Code/pywikipedia/10311
small cosmetics from rewrite

https://mediawiki.org/wiki/Special:Code/pywikipedia/10312
update namespace aliases

https://mediawiki.org/wiki/Special:Code/pywikipedia/10313
remove unused items,
remove feature request,
re-order disambiguation_comment,
new section header for cosmetic changes

https://mediawiki.org/wiki/Special:Code/pywikipedia/10314
Define the line_separator. Pages retrieved via API have "\n" whereas
pages fetched from screen (mostly) have "\r\n". Interwiki and category
separator settings in family files should use multiplied of this.
LS is a shortcut alias
(prevents null edits without any changes on the wiki)
update from rewirte

https://mediawiki.org/wiki/Special:Code/pywikipedia/10317
spelling mistake, fix for r10316, r10317 

https://mediawiki.org/wiki/Special:Code/pywikipedia/10320