[longomatch] Add override for ToString

[Andoni Morales Alastruey <amorales src gnome org>]

commit b14befc1689ee7ccaf27ee1e105d7ec584b1d401
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue Apr 14 13:37:11 2015 +0200

    Add override for ToString

 LongoMatch.Core/Store/ActionLink.cs |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/LongoMatch.Core/Store/ActionLink.cs b/LongoMatch.Core/Store/ActionLink.cs
index 50e83ad..47b9b4d 100644
--- a/LongoMatch.Core/Store/ActionLink.cs
+++ b/LongoMatch.Core/Store/ActionLink.cs
@@ -143,6 +143,11 @@ namespace LongoMatch.Core.Store
                {
                        return !(l1 == l2);
                }
+
+               public override string ToString ()
+               {
+                       return string.Format ("{0} -> {1}", SourceButton, DestinationButton);
+               }
        }
 }