Ensembl/ensembl-rest — pull request #14 by andrewyatz (2014-08-21 10:22:50+00:00)
Title: Fail to build a rate limiter if there is no backend.

Earlier versions of this assumed you could default fail over to a
simplebackend. Production showed this is not the case. There is no
reason for a failover and was a bad idea on my part. Now we croak if we
see there is not one given. Test suites have been updated accordingly.