Updated translations and changelog for 2.2.0 releae

CHANGELOG

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 queXS 2.2.0 - Changes since 2.1.5
 
+Fixed issue: Extension column not wide enough for long extensions
+Fixed issue: System sorting giving low priority where some quotas exist and not others
+
+New feature: Assign cases to any operator to be called next in queue
+New feature: Unassign all cases in the queue in one click
+
+Database changes:
 ALTER TABLE `extension` CHANGE `extension` `extension` CHAR( 20 ) NOT NULL;
 ALTER TABLE `sample_var` ADD INDEX ( `var_id` );
 
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 queXS 2.1.5 - Changes since 2.1.4
 
 Fixes some bugs including optimising the questionnaire outcome page queries. Translations have also been updated (Thank you!)