Loqusdb

Changed
- Convert version to string
- Use Github Actions for running CI instead of Travis

Added
- Option to add observation frequencies to exported VCF (--freq)

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

Added
- Use bulk updates when inserting snvs

Added
- CLI function to annotate variants
- CLI functionality to dump and restore a database

Fixed
- Fix bug with inserting variants