Make autocomplete step more general
Return false is dataset already exists
Use symbols instead of strings
Check dataset is present
Merge pull request #885 from theodi/feature-dont-allow-duplicates-via-api

Don't allow duplicates via api
Merge branch 'master' of github.com:theodi/open-data-certificate into feature-return-email-of-new-user-in-api

Conflicts:
	features/step_definitions/api_steps.rb
Add API tag