Remove Copyright from every source file

Replace it by website link; copyright appears in the LICENSE file already, which is sufficient
diff --git a/examples/c-to-c.py b/examples/c-to-c.py
index 6070108..88e66c5 100644
--- a/examples/c-to-c.py
+++ b/examples/c-to-c.py
@@ -4,7 +4,7 @@
 # Example of using pycparser.c_generator, serving as a simplistic translator
 # from C to AST and back to C.
 #
-# Copyright (C) 2008-2015, Eli Bendersky
+# Eli Bendersky [http://eli.thegreenplace.net]
 # License: BSD
 #------------------------------------------------------------------------------
 from __future__ import print_function