Use tagged versions for dependencies where possible

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/emicklei/go-restful/response.go

@@ -21,7 +21,7 @@ type Response struct {
 	http.ResponseWriter
 	requestAccept string   // mime-type what the Http Request says it wants to receive
 	routeProduces []string // mime-types what the Route says it can produce
-	statusCode    int      // HTTP status code that has been written explicity (if zero then net/http has written 200)
+	statusCode    int      // HTTP status code that has been written explicitly (if zero then net/http has written 200)
 	contentLength int      // number of bytes written for the response body
 	prettyPrint   bool     // controls the indentation feature of XML and JSON serialization. It is initialized using var PrettyPrintResponses.
 	err           error    // err property is kept when WriteError is called