Hide the POD about coverage binning methods 'coz they've still to be implem'ted.
Hide the POD about coverage binning methods 'coz they've still to be
implem'ted.

Do some argument checking in get_bins().

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