relay-compiler-language-graphitation

A relay-compiler plugin that wraps the TypeScript plugin and augments it slightly for @graphitation/apollo-react-relay-duct-tape's needs.

• Currently only emit typings, no relay-runtime metadata
• Allow interpolation of GraphQL fragment documents
• Rewrite @graphitation_test_operation to relay-compiler's @raw_response_type -- this will likely be removed short-term
• Rewrite relay-runtime import in generated artefacts to @graphitation/apollo-react-relay-duct-tape
• Strip __isFoo fields from raw response typings, which is something that relay-runtime needs