Remove import in header
Pod spec for development
Replace ".None" return value with an error unto itself
Share Xcode schemes
Replace our Result type with that of LlamaKit
UTI: Remove TagKind enum
UTI: Mark some extra bits private
Semi-failable UTI.init(preferredTag:conformingTo:)
Rebuild project to fix unit tests
Add UTI.init(preferredTag:conformingTo:) unit test