Profiling

Added

• Profiling feature added. Each sample gets a profile based on the genotypes for
  a set of high maf variants.
• High maf variants used in profiling is loaded into DB via CLI
• Reject loading a case if a similar profile already exists for any of the samples
• Statistics of the profiles in DB can be generated through CLI
• use bulk operations when deleting variants
• Compatible with GRCh38
• Option to include case count when querying for a variant

Fixed

• Use correct fields in index