ModifiableGenotypeData

Needs tests
ModifiableGeneticVariantIteratorTest
Added equals to sample
Modifiable Genotype data work in progres + some tests
Modifiable genotype data. Ref updates works + tests, fixed iterators
Modifialbe genotype data update ID works + tests
Dosage for modifiable genetic variant
Improve javadoc
Modifiable genotype data completly tested and working
Refactor genotype data reader formats
Fix reading plink files with the undocumented I and D alleles
Minor refactor
Minor test cleanup
Extra test ped map
ModifiableGenotypeData can remove variants, fully tested
Unsupported exception for variant filter genotype data
GeneticVariantTreeSet
Variant equals and hashcode, more javadoc, startup of comparator
Modifiable get number of excluded
First part of comparator implemented and tested