Add a generic way to deserialize a flatbuffer in Go.

Similar to what protobufs does with its `Message` interface, introduce here such interface and create a generic `GetRootAs` method to deserialize a flatbuffer.

tests/MyGame/Example/Monster.go

@@ -23,6 +23,10 @@ func (rcv *Monster) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Pos = i
 }
 
+func (rcv *Monster) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
 func (rcv *Monster) Pos(obj *Vec3) *Vec3 {
 	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
 	if o != 0 {

tests/MyGame/Example/Stat.go

@@ -22,6 +22,10 @@ func (rcv *Stat) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Pos = i
 }
 
+func (rcv *Stat) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
 func (rcv *Stat) Id() []byte {
 	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
 	if o != 0 {

tests/MyGame/Example/Test.go

@@ -15,6 +15,10 @@ func (rcv *Test) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Pos = i
 }
 
+func (rcv *Test) Table() flatbuffers.Table {
+	return rcv._tab.Table
+}
+
 func (rcv *Test) A() int16 {
 	return rcv._tab.GetInt16(rcv._tab.Pos + flatbuffers.UOffsetT(0))
 }

tests/MyGame/Example/TestSimpleTableWithEnum.go

@@ -22,6 +22,10 @@ func (rcv *TestSimpleTableWithEnum) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Pos = i
 }
 
+func (rcv *TestSimpleTableWithEnum) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
 func (rcv *TestSimpleTableWithEnum) Color() int8 {
 	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
 	if o != 0 {

tests/MyGame/Example/Vec3.go

@@ -15,6 +15,10 @@ func (rcv *Vec3) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Pos = i
 }
 
+func (rcv *Vec3) Table() flatbuffers.Table {
+	return rcv._tab.Table
+}
+
 func (rcv *Vec3) X() float32 {
 	return rcv._tab.GetFloat32(rcv._tab.Pos + flatbuffers.UOffsetT(0))
 }