FPA: Added .NET API calls

Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>

src/api/dotnet/FPSort.cs

@@ -0,0 +1,43 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    FPSort.cs
+
+Abstract:
+
+    Z3 Managed API: Floating Point Sorts
+
+Author:
+
+    Christoph Wintersteiger (cwinter) 2013-06-10
+
+Notes:
+    
+--*/
+
+using System;
+using System.Diagnostics.Contracts;
+
+namespace Microsoft.Z3
+{
+    /// <summary>
+    ///  A floating point sort
+    /// </summary>
+    public class FPSort : Sort
+    {
+        #region Internal
+        internal FPSort(Context ctx, IntPtr obj)
+            : base(ctx, obj)
+        {
+            Contract.Requires(ctx != null);
+        }
+        internal FPSort(Context ctx, uint ebits, uint sbits)
+            : base(ctx, Native.Z3_mk_fpa_sort(ctx.nCtx, ebits, sbits))
+        {
+            Contract.Requires(ctx != null);
+        }
+        #endregion
+    }
+}