add "notifyApp" to Zendesk.java and fix some warnings

Author: sceutre

src/main/java/org/zendesk/client/v2/Zendesk.java

@@ -759,6 +759,10 @@ public <T extends SearchResultEntity> Iterable<T> getSearchResults(Class<T> type
         return new PagedIterable<T>(tmpl("/search.json{?query}").set("query", query + "+type:" + typeName),
                 handleList(type, "results"));
     }
+    
+    public void notifyApp(String json) {
+       complete(submit(req("POST", tmpl("/api/v2/apps/notify.json"), JSON, json.getBytes()), handleStatus()));
+    }
 
     // TODO search with sort order
     // TODO search with query building API

src/main/java/org/zendesk/client/v2/model/Photo.java

@@ -2,8 +2,6 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
-import java.util.List;
-
 /**
  * @author stephenc
  * @since 05/04/2013 15:36

src/main/java/org/zendesk/client/v2/model/events/ChangeEvent.java

@@ -29,7 +29,7 @@ public void setPreviousValueObject(Object previousValue) {
             this.previousValue = null;
         } else if (previousValue instanceof List) {
             this.previousValue = new ArrayList<String>();
-            for (Object o : (List) previousValue) {
+            for (Object o : (List<?>) previousValue) {
                 this.previousValue.add(o == null || o instanceof String ? (String) o : o.toString());
             }
         } else if (previousValue instanceof String[]) {

src/main/java/org/zendesk/client/v2/model/events/CreateEvent.java

@@ -39,7 +39,7 @@ public void setValueObject(Object value) {
             this.value = null;
         } else if (value instanceof List) {
             this.value = new ArrayList<String>();
-            for (Object o : (List) value) {
+            for (Object o : (List<?>) value) {
                 this.value.add(o == null || o instanceof String ? (String) o : o.toString());
             }
         } else if (value instanceof String[]) {