#126, #123 - Added support for HAL curies.

Introduced CurieProvider interface as well as a DefaultCurieProvider that can be registered as Spring Bean to enable Links being rendered in a curie namespace and an additional curie link exposing the metadata of how to lookup the rel definition.

Deprecated Jackson 1 integration. Added helper class to find out whether a relation type is defined by the IANA.

src/main/java/org/springframework/hateoas/IanaRels.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.hateoas;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+
+/**
+ * Static class to find out whether a relation type is defined by the IANA.
+ * 
+ * @see http://www.iana.org/assignments/link-relations/link-relations.xhtml
+ * @author Oliver Gierke
+ */
+public class IanaRels {
+
+	private static final Collection<String> RELS;
+
+	static {
+
+		Collection<String> rels = new HashSet<String>();
+
+		rels.addAll(Arrays.asList("about", "alternate", "appendix", "archives", "author", "bookmark", "canonical",
+				"chapter", "collection", "contents", "copyright", "create-form", "current", "describedby", "describes",
+				"disclosure", "duplicate", "edit", "edit-form", "edit-media", "enclosure", "first", "glossary", "help",
+				"hosts", "hub", "icon", "index", "item", "last", "latest-version", "license", "lrdd", "memento", "monitor",
+				"monitor-group", "next", "next-archive", "nofollow", "noreferrer", "original", "payment",
+				"predecessor-version", "prefetch", "prev", "preview", "previous", "prev-archive", "privacy-policy", "profile",
+				"related", "replies", "search", "section", "self", "service", "start", "stylesheet", "subsection",
+				"successor-version", "tag", "terms-of-service", "timegate", "timemap", "type", "up", "version-history", "via",
+				"working-copy", "working-copy-of"));
+
+		RELS = Collections.unmodifiableCollection(rels);
+	}
+
+	/**
+	 * Returns whether the given relation type is defined by the IANA.
+	 * 
+	 * @param rel the relation type to check
+	 * @return
+	 */
+	public static boolean isIanaRel(String rel) {
+		return rel == null ? false : RELS.contains(rel);
+	}
+}