Full restructure in accordance with

- pkg/{subsystem}/{package} style
  - modify Makefile to reflect the new style,
    consolidate various entries
  - add a dummy ``main.go`` at top level

pkg/fileutils/split/Makefile

@@ -0,0 +1,11 @@
+all: build test
+.PHONY: all
+
+build:
+	@godep go build
+
+test: build
+	@godep go test -race -coverprofile=cover.out
+
+clean:
+	@rm -fv NEWFILE TESTPREFIX.* cover.out