fixed language file placeholders FS#2682

changed semicolon to colon in link to welcome page to make it less confusing

fixed validation errors in the installer

changed the link in the installer to point to wiki:welcome

removed outdated language string. it has to be retranslated

localization: removed strings from old flashuploader

Remove references to (un)?subscribens.

removed remnants of old flash uploader (FS#2335)

jqueryized locktimer

chmod -x inc/lang/az/*

These regular files were executable for no reason. They needed a special
rule for the Debian package, better to fix it upstream.

added 'register' and 'resendpwd' to action links and buttons

Attention: $lang['register'] has been renamed to $lang['btn_register'],
anyone using that in any plugin or template should adjust it.

Fix language encodings

Remove unneeded i18n files