directory structure change to work with glide

glide has its own requirements. My previous workaround caused me some
code checkin errors. Need to fix this.

weed/storage/compact_map_test.go

@@ -0,0 +1,77 @@
+package storage
+
+import (
+	"testing"
+)
+
+func TestIssue52(t *testing.T) {
+	m := NewCompactMap()
+	m.Set(Key(10002), 10002, 10002)
+	if element, ok := m.Get(Key(10002)); ok {
+		println("key", 10002, "ok", ok, element.Key, element.Offset, element.Size)
+	}
+	m.Set(Key(10001), 10001, 10001)
+	if element, ok := m.Get(Key(10002)); ok {
+		println("key", 10002, "ok", ok, element.Key, element.Offset, element.Size)
+	} else {
+		t.Fatal("key 10002 missing after setting 10001")
+	}
+}
+
+func TestXYZ(t *testing.T) {
+	m := NewCompactMap()
+	for i := uint32(0); i < 100*batch; i += 2 {
+		m.Set(Key(i), i, i)
+	}
+
+	for i := uint32(0); i < 100*batch; i += 37 {
+		m.Delete(Key(i))
+	}
+
+	for i := uint32(0); i < 10*batch; i += 3 {
+		m.Set(Key(i), i+11, i+5)
+	}
+
+	//	for i := uint32(0); i < 100; i++ {
+	//		if v := m.Get(Key(i)); v != nil {
+	//			glog.V(4).Infoln(i, "=", v.Key, v.Offset, v.Size)
+	//		}
+	//	}
+
+	for i := uint32(0); i < 10*batch; i++ {
+		v, ok := m.Get(Key(i))
+		if i%3 == 0 {
+			if !ok {
+				t.Fatal("key", i, "missing!")
+			}
+			if v.Size != i+5 {
+				t.Fatal("key", i, "size", v.Size)
+			}
+		} else if i%37 == 0 {
+			if ok && v.Size > 0 {
+				t.Fatal("key", i, "should have been deleted needle value", v)
+			}
+		} else if i%2 == 0 {
+			if v.Size != i {
+				t.Fatal("key", i, "size", v.Size)
+			}
+		}
+	}
+
+	for i := uint32(10 * batch); i < 100*batch; i++ {
+		v, ok := m.Get(Key(i))
+		if i%37 == 0 {
+			if ok && v.Size > 0 {
+				t.Fatal("key", i, "should have been deleted needle value", v)
+			}
+		} else if i%2 == 0 {
+			if v == nil {
+				t.Fatal("key", i, "missing")
+			}
+			if v.Size != i {
+				t.Fatal("key", i, "size", v.Size)
+			}
+		}
+	}
+
+}