RGDParser: switch from getline_hr() to getline()+bind_columns()
RGDParser: switch from getline_hr() to getline()+bind_columns()

getline_hr() creates a new hashref for every row so even Text::CSV
authors themselves recommend using a combination of bind_columns() with
getline() instead.

james-monkeyshines/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,Ensembl/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl