Add unordered_{set|map} and set to Java

Add test suite

Add to makefile

Revert set change

Fix java map test

Fix some of the tests

Fix unordered map test

Lib/java/std_unordered_set.i

@@ -0,0 +1,47 @@
+/* -----------------------------------------------------------------------------
+ * std_unordered_set.i
+ *
+ * SWIG typemaps for std::unordered_set
+ * ----------------------------------------------------------------------------- */
+
+%include <std_common.i>
+
+// ------------------------------------------------------------------------
+// std::unordered_set
+// ------------------------------------------------------------------------
+
+%{
+#include <unordered_set>
+%}
+
+namespace std {
+
+template <class KeyType>
+class unordered_set {
+  public:
+    unordered_set();
+    unordered_set(const unordered_set<KeyType>&);
+
+    unsigned int size() const;
+    bool empty() const;
+    void clear();
+
+    %extend {
+      // Returns whether item was inserted.
+      bool insert(const KeyType& key) {
+        return self->insert(key).second;
+      }
+
+      // Returns whether set contains key.
+      bool has(const KeyType& key) {
+        return (self->count(key) > 0);
+      }
+
+      // Returns whether the item was erased.
+      bool erase(const KeyType& key) {
+        return (self->erase(key) > 0);
+      }
+    }
+};
+
+}  // namespace std