Happy new year! (update copyright year)

Let's not wait until May this time
(f0a9b95a)!

MITL

-Copyright (c) 2013 mruby developers
+Copyright (c) 2014 mruby developers
 
 Permission is hereby granted, free of charge, to any person obtaining a 
 copy of this software and associated documentation files (the "Software"), 

README.md

@@ -73,7 +73,7 @@ documentation with examples under *examples/mrbgems*.
 
 ## License
 
-Copyright (c) 2013 mruby developers
+Copyright (c) 2014 mruby developers
 
 Permission is hereby granted, free of charge, to any person obtaining a 
 copy of this software and associated documentation files (the "Software"), 

include/mruby.h

 /*
 ** mruby - An embeddable Ruby implementation
 **
-** Copyright (c) mruby developers 2010-2013
+** Copyright (c) mruby developers 2010-2014
 **
 ** Permission is hereby granted, free of charge, to any person obtaining
 ** a copy of this software and associated documentation files (the

src/print.c

@@ -53,7 +53,7 @@ mrb_print_error(mrb_state *mrb)
 void
 mrb_show_version(mrb_state *mrb)
 {
-  static const char version_msg[] = "mruby - Embeddable Ruby  Copyright (c) 2010-2013 mruby developers\n";
+  static const char version_msg[] = "mruby - Embeddable Ruby  Copyright (c) 2010-2014 mruby developers\n";
   mrb_value msg;
 
   msg = mrb_str_new(mrb, version_msg, sizeof(version_msg) - 1);
@@ -63,7 +63,7 @@ mrb_show_version(mrb_state *mrb)
 void
 mrb_show_copyright(mrb_state *mrb)
 {
-  static const char copyright_msg[] = "mruby - Copyright (c) 2010-2013 mruby developers\n";
+  static const char copyright_msg[] = "mruby - Copyright (c) 2010-2014 mruby developers\n";
   mrb_value msg;
 
   msg = mrb_str_new(mrb, copyright_msg, sizeof(copyright_msg) - 1);