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_test2.fbs

@@ -0,0 +1,10 @@
+include "namespace_test1.fbs";
+
+namespace NamespaceA;
+
+table TableInFirstNS
+{
+    foo_table:NamespaceB.TableInNestedNS;
+	foo_enum:NamespaceB.EnumInNestedNS;
+	foo_struct:NamespaceB.StructInNestedNS;
+}