Cleaned up namespace handling.

A Namespace object is now guaranteed unique.
This cleaned up some old workarounds and latent bugs.

Change-Id: Ic3f12d89947871b03b2c449ba51b3186f953adde
Tested: on Linux.
Bug: 21336857

tests/MyGame/InParentNamespace.go

@@ -0,0 +1,34 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+package MyGame
+
+import (
+	flatbuffers "github.com/google/flatbuffers/go"
+)
+
+type InParentNamespace struct {
+	_tab flatbuffers.Table
+}
+
+func GetRootAsInParentNamespace(buf []byte, offset flatbuffers.UOffsetT) *InParentNamespace {
+	n := flatbuffers.GetUOffsetT(buf[offset:])
+	x := &InParentNamespace{}
+	x.Init(buf, n+offset)
+	return x
+}
+
+func (rcv *InParentNamespace) Init(buf []byte, i flatbuffers.UOffsetT) {
+	rcv._tab.Bytes = buf
+	rcv._tab.Pos = i
+}
+
+func (rcv *InParentNamespace) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
+func InParentNamespaceStart(builder *flatbuffers.Builder) {
+	builder.StartObject(0)
+}
+func InParentNamespaceEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
+	return builder.EndObject()
+}