add index and description for RsMergeArch
add index and description for RsMergeArch

knmkr/dbsnp-pg-min,knmkr/dbsnp-pg-min,knmkr/dbsnp-pg-min,knmkr/dbsnp-pg,knmkr/dbsnp-pg,knmkr/dbsnp-pg,knmkr/dbsnp-pg-min