Build and install from GOPATH

* Rename 'vendor/src' -> 'vendor'
  * Ignore vendor/ instead of vendor/src/ for lint
* Rename 'cmd/client' -> 'cmd/ocic' to make it 'go install'able
* Rename 'cmd/server' -> 'cmd/ocid' to make it 'go install'able
* Update Makefile to build and install from GOPATH
* Update tests to locate ocid/ocic in GOPATH/bin
* Search for binaries in GOPATH/bin instead of PATH
* Install tools using `go get -u`, so they are updated on each run

Signed-off-by: Jonathan Yu <jawnsy@redhat.com>

vendor/gopkg.in/cheggaaa/pb.v1/reader.go

@@ -0,0 +1,25 @@
+package pb
+
+import (
+	"io"
+)
+
+// It's proxy reader, implement io.Reader
+type Reader struct {
+	io.Reader
+	bar *ProgressBar
+}
+
+func (r *Reader) Read(p []byte) (n int, err error) {
+	n, err = r.Reader.Read(p)
+	r.bar.Add(n)
+	return
+}
+
+// Close the reader when it implements io.Closer
+func (r *Reader) Close() (err error) {
+	if closer, ok := r.Reader.(io.Closer); ok {
+		return closer.Close()
+	}
+	return
+}