Added TODO
Bug fix
Alleles and Allele comparable
Major changes (see description)

- Variant comparator completed
- Gave SampleVariantProviders a unique id
- Bugfix GeneticVariantTreeSet
- Made ped map reader much faster by using genetic variant treeset
Minor refactor and small bug fix in Allele
Bug fix in MAF trying to count 0 alleles
Merge pull request #28 from PatrickDeelen/master

Diverse updates some bug fixes