Add download file and remove OptiVax folder

.gitignore

OptiVax_Data/LICENSE

OptiVax_Data/Peptides/30_filtered_mhc_peptides.pep

...Peptides/combined_filtered_mhc_peptides_gifford_style.pep

...ata/Peptides/mhcII_peptides_with_mutations_5embedding.pep

...Data/Peptides/mhcI_peptides_with_mutations_5embedding.pep

.../optivax_robust_mhc1_haplotype_4519_filtered_peptides.pep

...optivax_robust_mhc2_haplotype_37435_filtered_peptides.pep

...Peptides/optivax_unlinked_mhc1_4512_filtered_peptides.pep

...des/optivax_unlinked_mhc1_639_filtered_peptides_spike.pep

...eptides/optivax_unlinked_mhc2_37435_filtered_peptides.pep

...Peptides/optivax_unlinked_mhc2_5064_filtered_peptides.pep

OptiVax_Data/Peptides/peptides_13-25.pep

OptiVax_Data/Peptides/peptides_8-10.pep

README.md

download_data.sh