added some cmdline args and listing of igi's based on the extent to which they chain together
added some cmdline args and listing of igi's based on the extent to which
they chain together

at7/ensembl,muffato/ensembl,mjg17/ensembl,james-monkeyshines/ensembl,muffato/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,at7/ensembl,mjg17/ensembl,Ensembl/ensembl,mjg17/ensembl,Ensembl/ensembl,danstaines/ensembl,Ensembl/ensembl,mjg17/ensembl,at7/ensembl,at7/ensembl,willmclaren/ensembl,danstaines/ensembl,muffato/ensembl,willmclaren/ensembl,danstaines/ensembl,muffato/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl