Data model - Improved encapsulation

Conditions - Renamed from DisplayConditions to DataModelConditions to better match their nature
Core - More documentation

src/Artemis.Core/Services/Interfaces/IPluginService.cs

@@ -70,10 +70,10 @@ namespace Artemis.Core.Services
         List<PluginInfo> GetAllPluginInfo();
 
         /// <summary>
-        ///     Finds all enabled <see cref="Plugin" /> instances of type T
+        ///     Finds all enabled <see cref="Plugin" /> instances of <typeparamref name="T"/>
         /// </summary>
         /// <typeparam name="T">Either <see cref="Plugin" /> or a plugin type implementing <see cref="Plugin" /></typeparam>
-        /// <returns>Returns a list of plug instances of type T
+        /// <returns>Returns a list of plugin instances of <typeparamref name="T"/></returns>
         List<T> GetPluginsOfType<T>() where T : Plugin;
 
         /// <summary>

src/Artemis.Core/Services/Storage/Interfaces/ISurfaceService.cs

@@ -3,6 +3,9 @@ using System.Collections.ObjectModel;
 
 namespace Artemis.Core.Services
 {
+    /// <summary>
+    ///     Provides access to the device surface and its configuration
+    /// </summary>
     public interface ISurfaceService : IArtemisService
     {
         /// <summary>