Welsh translation (cy) of lang files

Plugin translation #1

Translation update (nl)

Translation update (uk)

Translation update (fa)

Just translation of lang array items in inc/lang main php file

Translation update (sk)

4th translations session - stopwords

Third translation session of inc/lang

Second translation

Translation update (pt)

Translation update (de)

Translation update (ko)

Translation update (he)

Translation update (zh)

Fixed bug in obtainLock(), where it always fails to verify the lock. …

Translation update (it)

Update lang.php (FR translation's one)

autor duplicated + < and > fixes.

Translation update (fr)

Update lang.php (FR translation's one)

* contributors duplication
* adding myself to the contributors' list
* typo

Translation update (th)

The token login was introduced for the flash uploader. Since it has been
removed there is no need for this code anymore.