Adds reference_genome access from API.
Adds actions for creating and updating reference_genomes.
Added cucumber behavioral scenarios for testing new functionality
Added support for using uuid-based cucumber tests for reference_genome
  into uuid_steps config.
Update root.feature with new reference_genome access.
Adds read access to name on reference_genome
Merge pull request #861 from emrojo/api-reference-genome-creation

Adds reference_genome access to API.