Dev bedclassifier script

[donaldcampbelljr]

• Add bed classifier script which fetches bed files, classifies them and then reports the types to pephub.
• Use this script to aid in tuning the bed classifier system.

[donaldcampbelljr]

More work towards #60

The major modification to the pipeline:

• add exception handling around utf-16 files.

The script I added for testing runs separately from the main pipeline and should not impact performance.

Most recent testing added to PEP: https://pephub.databio.org/donaldcampbelljr/bedclassifier_tuning_geo?tag=default ~95% accuracy on classification for bed files for n=1567 bedfiles

[donaldcampbelljr]

We chatted about the above and agreed to merge the changes since only exceptions were added to main pipeline and everything else (such as the BedClassifier Class) are self contained