updated pl_PL translation
Merge pull request #62 from speccode/translation

updated pl_PL translation ... thanks.
Code quality review
Merge branch 'master' of github.com:lloc/Multisite-Language-Switcher
Code quality review
Code quality review
Code quality review
Code quality review
Code quality review
Armenian language corrected
Lithuanian language updated
Bugfix: The method has_value cannot be called on $mydata (of type null).
Unused code removed
Issue "Code duplication" reviewed
Issue "Code duplication" reviewed
Merge branch 'master' of https://github.com/lloc/Multisite-Language-Switcher

Conflicts:
	includes/MslsBlogCollection.php
Test compare multiple values
Refactoring
Scrutinizer config
Scrutinizer config