added new generate_multihetsep tool
generate_multihetsep finished, unittest passed, needs testing with real data
changed hetsep to tab-separated, also adjusted branchlength
added possibility to force output at given list of alleles, if present as hom-ref or het
modified tools
added new phasing tool, compiles but not tested
finished phasing script
clarified that position file is exclusive
introduced a cap on crossLambda<1