Checking in changes prior to tagging of version 0.55.

Checking in changes prior to tagging of version 0.55.

Changelog diff is:

diff --git a/Changes b/Changes
index 1613575..70ea0ee 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 Revision history for Mouse

+0.55 Wed Apr 21 13:27:13 2010
+    [BUF FIX]
+    * Fix a bug that traits could cause panic/SEGV on threads (gfx)
+
 0.54 Sat Apr 17 17:15:54 2010
     [BUG FIX]
     * Resolve RT#56523: has with reader, writer, lazy and builder