Added -ignore_haplotypes flag to method get_chrlengths_v20
Added -ignore_haplotypes flag to method get_chrlengths_v20

mn1/ensembl-analysis,Ensembl/ensembl-analysis,kiwiroy/ensembl-analysis,mn1/ensembl-analysis,Ensembl/ensembl-analysis,james-monkeyshines/ensembl-analysis,mn1/ensembl-analysis,kiwiroy/ensembl-analysis,james-monkeyshines/ensembl-analysis,james-monkeyshines/ensembl-analysis,Ensembl/ensembl-analysis