Create gists from git http server endpoint (#95)

go.mod

@@ -25,6 +25,9 @@ require (
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/mux v1.6.2 // indirect
 	github.com/gorilla/securecookie v1.1.1 // indirect
+	github.com/hashicorp/go-immutable-radix v1.3.0 // indirect
+	github.com/hashicorp/go-memdb v1.3.4 // indirect
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/labstack/gommon v0.4.0 // indirect