Added -upload option.
Added -upload option.

Improved usage docs.

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