Fixing bug in .A.entropies file: uniprot residue numbers now correct
New script to check uniprot annotations
Fixing issue in pdb-to-uniprot reference mapping: 
now identity is calculated on query side (identities over query length
instead of identities over alignment length). Thanks to that the mapping
pdb2uniprot id threshold can go up to 90% which still allows for a lot
of mutations. Mapping of files without SEQRES and long density gaps will
be fine (they will now have 100% identity if no mutations present)