Fix to #360 - Updated the general generator (Java/C#) to emit fully qualified names where the referenced object isn't directly in this namespace. Added test fbs files to verify compilation.

tests/namespace_test/namespace_test1.fbs

@@ -0,0 +1,17 @@
+namespace NamespaceA.NamespaceB;
+
+table TableInNestedNS
+{
+    foo:int;
+}
+
+enum EnumInNestedNS:byte
+{
+	A, B, C
+}
+
+struct StructInNestedNS
+{
+    a:int;
+	b:int;
+}