Implement GDS

[gtollefson]

Implement GDS as main data structure and GDS querying to replace tidy parsing as primary filtering functions to allow scalabiulity to large VCFS.

Involves:

1. Add VCF to GDS T script to be run after MIPTools or as part of MIPTools
2. Add relevant metadata to GDS object
3. Make metadata adding and querying dynamic to allow new metadata field querying without new feature patch
4. Replace tidy parsing functions with efficient GDS query functions
5. Benchmark new dev version against original version
6. Profile with profviz code profiler tool to identify memory/time/duplicate process bottlenecks and resolve with alternative functions/logic solutions