Refactoring:
    The old runners now are tasks
All uses of VcfRecord converted to Variant
Changed VariantDBWriter to VariantWriter
Dependencies from OpenCGA removed
Renamed PedReader mentions
Merge branch 'feature/newRunners' of github.com:opencb/variant into feature/newRunners
Removed dependency from OpenCGA
Minor changes
Renamed VcfAnnot/Effect/Filter/Stats by VariantAnnot/Effect/Filter/Stats
Conflicts with origin resolved
Merge branch 'feature/newRunners' into develop