Merge pull request #264 from piwik/translationupdates

[automatic translation update] Updated 1964 strings in 37 languages (ar, be, bg, bs, ca, cs, da, de, el, en, es, et, fa, fi, fr, he, hi, hu, id, it, ja, ka, ko, lt, lv, nb, nl, pl, pt, ru, sq, sr, sv, th, uk, vi, ro)
Fixes #5039 Deprecate archive.sh by printing warning message, returning error, and still we try to stay backward compatible by running ./console core:archive
Follows up 9cc59e84a1819 -> path separator has 2 bytes on windows, so we should compare two bytes
Fixes #5041 - check if procfs is mounted
Load plugin fixtures in SetupFixture command.
Fixing build.
Updating UI submodule (fixing build).
Merge branch 'master' of https://github.com/piwik/piwik
Fixes #5041 - ditch negative semantic, that's more readable
Remove one spam entry from PR #264
Removing extra link in hindi credit
Removing keyword links to favor links on translator names. See: http://piwik.org/translations/
Explicitly enable access to web cron script

See issue http://forum.piwik.org/read.php?2,109382
Update .htaccess
code simplification : API::getInstance()->getSitesWithAdminAccess() returns all sites if user has super user access
Setting the default timezone to UTC in the core:archive script, refs #5043
This could potentially cause some big problems.
Fixes #2268 Implement a default Referrer spam blacklist to block semalt.com spammer. (can be extended to other spammers on request!)

; All Visits with a Referrer URL host set to one of these will be excluded.
; If you find new spam entries in Referrers>Websites, please report them here: http://dev.piwik.org/trac/ticket/2268
; List of known Referrer Spammers, ie. bot visits that set a fake Referrer field:
referrer_urls_spam = "semalt.com"
Allow just archive.php
Preventing random build issue: https://travis-ci.org/piwik/piwik/jobs/23912449
Merge pull request #266 from piotr-cz/patch-1

Explicitly enable access to web cron script