Assert LeafLabs copyright in wirish/Print.cpp.

This should get replaced with a clean-room MIT licensed version, but
pieces of it are ours (notably the bugfixes to the floating point
printing routines), so might as well do the copyright thing.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

wirish/Print.cpp

@@ -1,6 +1,7 @@
 /*
  * Print.cpp - Base class that provides print() and println()
  * Copyright (c) 2008 David A. Mellis.  All right reserved.
+ * Copyright (c) 2011 LeafLabs, LLC.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public License