Add DataQuery objects for ProfileProperty

Author: dualspiral

src/main/java/org/spongepowered/api/data/persistence/Queries.java

@@ -87,6 +87,11 @@ public final class Queries {
     public static final DataQuery UUID_MOST = of("UuidMost");
     public static final DataQuery POSITION = of("Pos");
 
+    // ProfileProperty
+    public static final DataQuery PROPERTY_NAME = of("name");
+    public static final DataQuery PROPERTY_VALUE = of("value");
+    public static final DataQuery PROPERTY_SIGNATURE = of("signature");
+
     // Suppress default constructor to ensure non-instantiability.
     private Queries() {
         throw new AssertionError("You should not be attempting to instantiate this class.");

src/main/java/org/spongepowered/api/profile/property/ProfileProperty.java

@@ -36,7 +36,9 @@
 /**
  * Represents a property in a {@link GameProfile}'s profile property map.
  *
- * <p>This interface should not be implemented.</p>
+ * <p>This interface should not be implemented by third parties - use
+ * {@link #of(String, String)} or {@link #of(String, String, String)} to
+ * create instances instead.</p>
  *
  * @see #of(String, String)
  * @see #of(String, String, String)