MethodError from XLSX.readtable() in 01.Data Notebook

[BenBol]

Indexing the output of XLSX.readtable() in the "01. Data.ipynb" results in a MethodError.
According to the Docs of XLSX, the output has been converted to a class instead of a tuple.
Hence, the indexing in the following cells does not work.
As a fix, I would store it directly inside the DataFrame.

However, since I have only installed Julia for one hour, I do not feel comfortable to rewrite the introduction :)

[BenBol]

I also found a Typo near the end...
"Each vector in M["V2"] is a fase image. Let's reshape the first one and take a look."
but should be "face"