Some files missing "." for import

[brean]

Hi,

I noticed that the files
https://github.com/TensorLab/tensorfx/blob/master/src/data/__init__.py and
https://github.com/TensorLab/tensorfx/blob/master/src/training/_trainer.py
are missing the dot before after the "from " import statements. So tensorfx does not run on my machine. Is this a bug or intended?