Switch from Godep to go vendoring

vendor/github.com/cznic/b/example/Makefile

@@ -0,0 +1,35 @@
+# Copyright 2014 The b Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+.PHONY: all todo clean cover mem
+
+testbin=b.test
+
+all: editor
+	go build
+	go vet
+	make todo
+
+editor:
+	go fmt
+	go test -i
+	go test
+
+mem:
+	go test -c
+	./$(testbin) -test.bench . -test.memprofile mem.out -test.memprofilerate 1
+	go tool pprof --lines --web --alloc_space $(testbin) mem.out
+
+todo:
+	@grep -n ^[[:space:]]*_[[:space:]]*=[[:space:]][[:alpha:]][[:alnum:]]* *.go || true
+	@grep -n TODO *.go || true
+	@grep -n BUG *.go || true
+	@grep -n println *.go || true
+
+clean:
+	@go clean
+	rm -f *~
+
+cover:
+	t=$(shell tempfile) ; go test -coverprofile $$t && go tool cover -html $$t && unlink $$t