[gnome-chess] Use namespace instead of class for BitBoard

[Michael Catanzaro <mcatanzaro src gnome org>]

commit cff0c343e53ade1c9d7442fd6e1d027eefc53572
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed Jul 27 23:36:03 2016 -0500

    Use namespace instead of class for BitBoard
    
    This class contains only constants and static functions, so generating a
    ton of GObject code here for an object that never gets instantiated is
    way overkill. Use namespace instead of class to clarify this.

 lib/chess-bitboard.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/lib/chess-bitboard.vala b/lib/chess-bitboard.vala
index 517650f..25042c3 100644
--- a/lib/chess-bitboard.vala
+++ b/lib/chess-bitboard.vala
@@ -9,7 +9,7 @@
  * license.
  */
 
-public class BitBoard : Object
+namespace BitBoard
 {
     /* Bitboard for each location */
     public const int64 set_location_masks[] =
@@ -1291,7 +1291,7 @@ public class BitBoard : Object
         0x6c38000000000000, 0x5070000000000000, 0xa0e0000000000000, 0x40c0000000000000
     };
 
-    public static string to_string (int64 mask)
+    public string to_string (int64 mask)
     {
         var string = "+---+---+---+---+---+---+---+---+\n";
         int rowCount = 0;