Added functionality to get custom post types

Author: clintonbosch

src/main/java/com/afrozaar/wordpress/wpapi/v2/Client.java

@@ -335,6 +335,14 @@ public PostMeta createMeta(Long postId, String key, String value) {
         return exchange.getBody();
     }
 
+    @Override
+    public PostMeta createCustomPostMeta(Long postId, String key, String value, String customPostTypeName) {
+        final Map<String, String> body = ImmutableMap.of(META_KEY, key, META_VALUE, value);
+        final ResponseEntity<PostMeta> exchange = doExchange1(Request.CUSTOM_POST_METAS, HttpMethod.POST, PostMeta.class, forExpand(customPostTypeName, postId), null, body,
+                MediaType.APPLICATION_JSON);
+        return exchange.getBody();
+    }
+
     @Override
     public List<PostMeta> getPostMetas(Long postId) {
         final ResponseEntity<PostMeta[]> exchange = doExchange1(Request.METAS, HttpMethod.GET, PostMeta[].class, forExpand(postId), null, null);

src/main/java/com/afrozaar/wordpress/wpapi/v2/api/PostMetas.java

@@ -11,6 +11,8 @@ public interface PostMetas {
 
     PostMeta createMeta(Long postId, String key, String value);
 
+    PostMeta createCustomPostMeta(Long postId, String key, String value, String customPostTypeName);
+
     List<PostMeta> getPostMetas(Long postId);
 
     PostMeta getPostMeta(Long postId, Long metaId);