Use licence/authority name when available, fall back to slug.

@pbadenski
@abersager
Use one directory for storing fixtures

@abersager
@pbadenski
Use factory method for creating license and authority

@abersager
@pbadenski
Use more idiomatic Ruby approach

@abersager
@pbadenski
Merge pull request #32 from alphagov/use-name-instead-of-slug

Use name instead of slug for licence and authority