Automatically download Pfam

[adraismawur]

When a storage location for the Pfam files is specified or implied (default [big_scape_dir]/pfam)
When a version of Pfam is specified or implied (default 31.0)
Then that version of the Pfam .hmm file should be downloaded and extracted
So that the users are not required to do this manually

Tasks:

• Implement checking for pfam at specified dir
• Implement pfam version command line argument
• Implement downloading relevant pfam
• Implement extracting pfam to directory
• Implement running hmmpress on downloaded pfam
• Remove downloading from dockerfile

[adraismawur]

This is currently done in the docker file, by the way, but should be handled in the application for running this natively.