Condition operators - Marked built-in operators as internal

Display conditions - Added docs to the service and profile types
Color gradient - Added docs
Storage - Moved profile entities to separate namespaces
Data bindings - Added entities to storage
Data bindings - Started implementing in the core

src/Artemis.Storage/Entities/Profile/DataBindings/DataBindingEntity.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+
+namespace Artemis.Storage.Entities.Profile.DataBindings
+{
+    public class DataBindingEntity
+    {
+        public DataBindingEntity()
+        {
+            Modifiers = new List<DataBindingModifierEntity>();
+        }
+
+        public Guid? SourceDataModelGuid { get; set; }
+        public string SourcePropertyPath { get; set; }
+        public int DataBindingMode { get; set; }
+        public TimeSpan EasingTime { get; set; }
+        public int EasingFunction { get; set; }
+
+        public List<DataBindingModifierEntity> Modifiers { get; set; }
+    }
+}