translation update

translation update

updated dates in various info.txt files

Update lang.php

Please someone who know the code, double check this one.
It does look that translation for 2 options were missing.

fixed occurrences of html named entities in translation files to be xhtml-compatible

changed all input type=submit buttons to button type=submit button for better stylability

adjust newline

__construct

Changes for PHP 7 Compatibility
- replace PHP4 style class constructor function names (based on
class name) with php 5 __construct()
Also remove some '&' reference operators used with objects
And a

Changes for PHP 7 Compatibility
- replace PHP4 style class constructor function names (based on
class name) with php 5 __construct()
Also remove some '&' reference operators used with objects
And add some object type hints

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add plugin groups to config plugin test

Losslessly reduced PNG images with optipng -o7 -strip all, advdef -z4 -i60, and advpng -z4 -i60.

Scrutinizer Auto-Fixes

This commit consists of patches automatically generated for this project on https://scrutinizer-ci.com

fixed search'and'replace fuckup in config plugin

Remove error supression for file_exists()

In an older version of PHP a file_exists() call would issue a warning
when the file did not exist. This was fixed in later PHP releases. Since
we require PH

Remove error supression for file_exists()

In an older version of PHP a file_exists() call would issue a warning
when the file did not exist. This was fixed in later PHP releases. Since
we require PHP 5.3 now, there's no need to supress any error here
anymore. This might even give a minor performance boost.

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PHPDocs and some improvements

more PHPDocs, unused var, small bit code reformatting

more scrutinizer issue improvements

updated dates in info.txt of various plugins and template

Bulgarian language update

Fixed spelling in lang.php

Changed "Erweitertet" to "Erweitert" since the word "Erweitertet" does not exist, see: http://www.duden.de/suchen/dudenonline?s=erweitertet

Also, see leo.org translatio

Fixed spelling in lang.php

Changed "Erweitertet" to "Erweitert" since the word "Erweitertet" does not exist, see: http://www.duden.de/suchen/dudenonline?s=erweitertet

Also, see leo.org translation for "advanced" to german: http://dict.leo.org/ende/index_de.html#/search=advanced&searchLoc=0&resultOrder=basic&multiwordShowSingle=on

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add visibility and PHPDocs to config plugin class

added config stuff for disabling RSS

Extend showuseras config with username_link

uses the user interwiki link as profile link

removed empty language files

our translation interface used to submit empty files for a while but no
longer does, so these can go