Merging postreleasefix/91 to master
Merging postreleasefix/91 to master

* postreleasefix/91:
  iterate_sub could either return a scalar or an array

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode