Move generate code into a separate library

Signed-off-by: Haiyan Meng <[email protected]>

Author: Haiyan Meng

.gitignore

@@ -26,7 +26,7 @@ _testmain.go
 
 # Compiled binaries
 oci
-ocitools
+/ocitools
 /runtimetest
 
 *.1

Makefile

@@ -5,7 +5,7 @@ BUILDTAGS=
 export GOPATH:=$(CURDIR)/Godeps/_workspace:$(GOPATH)
 
 all:
-	go build -tags "$(BUILDTAGS)" -o ocitools .
+	go build -tags "$(BUILDTAGS)" -o ocitools ./cmd/ocitools
 	go build -tags "$(BUILDTAGS)" -o runtimetest ./cmd/runtimetest
 
 .PHONY: man