RecyclableList<T> and RecyclableLongList<T> implemented. Merge from recyclable-block-list-added branch.

Recyclable.Collections/IRandomNumberGenerator.cs

@@ -1,6 +1,6 @@
 namespace Recyclable.Collections
 {
-	public interface IRandomNumberGenerator
+	internal interface IRandomNumberGenerator
 	{
 		int NextInt32(int startIndex, int endIndex);
 	}