simplify slice caching
add _selenocysteine_positions method; fetches all selenocysteine positions for a translation as an arrayref
edit peptide sequences with selenocysteines if present
prefetch selenocysteine positions
 add support for --merged
script that merges ensembl and refseq VEP cache files
fix
bit of cleaning up
remove dbentries field from translations
code for --pick_allele
fix for pick_allele
remember to restore slice adaptor
update to support adding assembly version
add species and assembly to cache info.txt
dont go to tabix cache if using --database
Update the parsing of the NHGRI GWAS Catalog ratio data
support assembly versions in cache directory structure from 76 onwards
ignore genotypes that don't match allele_string
Merge branch 'hotfix/reseq-mismatching-genotypes' into release/76