migration to add peptide_id to peptides. Also changed the Peptide class(peptide parser) so it doesn't match the Peptide model. And shit
 changed the db schema, peptide are not related to sii anymore, sii are related through join table to peptide_evidences, and peptide and modifications are related to the peptide_evidence table. Also peptideEvidence parser in process
changes to peptide_evidence and related models and their relations. Also added fragment parsing in spectrum_ident_results method
changes to peptide_evidence and related models and their relations. Also added fragment parsing in spectrum_ident_results method