vendor dependencies with dep

vendor/github.com/go-chi/render/README.md

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+# render
+
+The `render` package helps manage HTTP request / response payloads.
+
+Every well-designed, robust and maintainable Web Service / REST API also needs
+well-*defined* request and response payloads. Together with the endpoint handlers,
+the request and response payloads make up the contract between your server and the
+clients calling on it.
+
+Typically in a REST API application, you will have your data models (objects/structs)
+that hold lower-level runtime application state, and at times you need to assemble,
+decorate, hide or transform the representation before responding to a client. That
+server output (response payload) structure, is also likely the input structure to
+another handler on the server.
+
+This is where `render` comes in - offering a few simple helpers and interfaces to
+provide a simple pattern for managing payload encoding and decoding.
+
+We've also combined it with some helpers for responding to content types and parsing
+request bodies. Please have a look at the [rest](https://github.com/go-chi/chi/blob/master/_examples/rest/main.go)
+example which uses the latest chi/render sub-pkg.
+
+All feedback is welcome, thank you!
+