External format when opening files

[Yehouda]

in csv.lisp, %in-stream opens the file with *default-external-format*, which defaults to :default. That works if the default external format of the Lisp in which you run matches the external-format of the file. In particular, when runnign the tests, the files test fails if the default is not utf-8.

Since the input files are in utf-8, somewhere, either in the code itself or in the test, needs to force it to be utf-8. The asdf varaible asdf:*utf-8-external-format* (actually in uiop/stream) is a good value to use to make it portable.