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/github.com/mtrmac/gpgme/callbacks.go

@@ -0,0 +1,42 @@
+package gpgme
+
+import (
+	"sync"
+)
+
+var callbacks struct {
+	sync.Mutex
+	m map[uintptr]interface{}
+	c uintptr
+}
+
+func callbackAdd(v interface{}) uintptr {
+	callbacks.Lock()
+	defer callbacks.Unlock()
+	if callbacks.m == nil {
+		callbacks.m = make(map[uintptr]interface{})
+	}
+	callbacks.c++
+	ret := callbacks.c
+	callbacks.m[ret] = v
+	return ret
+}
+
+func callbackLookup(c uintptr) interface{} {
+	callbacks.Lock()
+	defer callbacks.Unlock()
+	ret := callbacks.m[c]
+	if ret == nil {
+		panic("callback pointer not found")
+	}
+	return ret
+}
+
+func callbackDelete(c uintptr) {
+	callbacks.Lock()
+	defer callbacks.Unlock()
+	if callbacks.m[c] == nil {
+		panic("callback pointer not found")
+	}
+	delete(callbacks.m, c)
+}