MRG: enable dayhoff, hp sketching

[bluegenes]

Adds dayhoff and hp sketching of protein files

• Modifies parse_params_str and build_sig to parse dayhoff and hp in params and build signature templates. Protein signature templates will now include all protein, dayhoff, hp sigs. These functions are now used both in branchwater manysketch and here, so are good candidates for going back into sourmash, probably here: src/core/src/cmd.rs

General note: we do not yet support translated sketches, so dayhoff and hp (like protein) will only be made from protein files.

[bluegenes]

@ctb also ready for review