LimeSurvey/LimeSurvey — pull request #214 by vundicind (2014-08-31 06:17:45+00:00)
Title: Fixed issue: Misuse of 'xml' as file extension for TSV format

I think the `xls` extension from the `import_survey` function stands for tab-separated-values format. If I'm right then it must be changed to `txt`.