Complete refactoring on Indexing module

Changed Parse() to use lucene syntax
Moved everything to Orchard.Indexing
New filters for search

--HG--
branch : dev

src/Orchard.Web/Modules/Orchard.Indexing/Services/IIndexService.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace Orchard.Indexing.Services {
+    public interface IIndexingService : IDependency {
+        bool HasIndexToManage { get; }
+        void RebuildIndex();
+        void UpdateIndex();
+        DateTime GetIndexUpdatedUtc();
+    }
+}