- more informative death when there has been no method defined for a   config variable - parameters_hash now returns a ref to an empty hash (rather than undef)   when no parameters have been specified
- more informative death when there has been no method defined for a
  config variable
- parameters_hash now returns a ref to an empty hash (rather than undef)
  when no parameters have been specified

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