Update handeling of allele swap
Disabled pedmap writer test
Add consctrutor with default tbi
Support to handle multiple files a single dataset
Varaint alleles compare
small improvement
Extra test + minor bugfix
Test if variant is AT or GC SNP + test
Hash and Equals GeneticVariants
Fixed variant count bug in multipart genotype data
Update LD calculator
Chromosome comparator
Fix visibilaty bug of ld calculator
CachedSampleVariantProvider
Fixed some failing tests
Plink files now handele both space and tab separators

Space and tab can be used mixed in a single files as they are being
generate inpractise by some tools.
MultiPartGenotypeData now uses custom cache size for VCF
PedMapGenotypeWriter extentsion
Merge pull request #13 from PatrickDeelen/master

Update handeling of genotype swap