v4.0.0

Changed

• End support for Node < 6; remove Babel compilation to /dist directory and point package.json directly to non-compiled source files
• Moved datasets provider to its own directory and leverage the registration function
• Moved provider options validation to ProviderRegistration
• Refactored provider status info
• Refactored provider registration, output registration, and controller treatment.

Fixed

• path construction when no host or id parameter