Autodetecting encodings! Data-only conversions! Yay!

This release will, with any luck at all, be the end of character encoding issues. (Fie on you, µV!) Files from before Acqknowledge 4.0 are assumed to be using latin-1 encoding, while 4.0 and on are assumed to be using UTF-8. This strikes me as likely true, but if it seems not to be, let me know. I can't run old versions of Acqknowledge any more, so I'm relying on examples people send in. Thanks to @benoitvalery and others who have done exactly that.

Also, if you're going to be publishing data, acq2hdf5 and acq2mat have a new option that may make you happy: --data-only. With that option, event markers and the journal (both of which can contain identifiers such as visit dates) will not be written into the output files.

Go forth! Read data! Wear a mask!